United States
           Environmental Protection
           Agency
Office of Air Quality
Planning and Standards
Research Triangle Park NC 27711
EPA-450/4-91-020
August 1991
           Air
&EPA    Office of Air Quality Planning
          and Standards (OAQPS)
          Technology Transfer Network (TTN)

          User's Manual

-------

-------
                         EPA-450/4-91-020
Office of Air Quality Planning
and Standards (OAQPS)
Technology Transfer Network (TTN)

 User's Manual
              Prepared for
     U.S. ENVIRONMENTAL PROTECTION AGENCY
      Office of Air Quality Planning and Standards
        Technical Support Division (MD-14)
        Research Triangle Park, NC 27711
              August 1991

-------
DISCLAIMER

     This  report  has  been reviewed  by the  Office  of  Air
Quality Planning and  Standards, U.S. Environmental Protection
Agency, and has been approved for publication.  Any mention of
trade  names  or  commercial  products  is  not  intended  to
constitute endorsement or recommendation for use.

-------
             OAQPS TECHNOLOGY TRANSFER NETWORK
                        USERS MANUAL
                     TABLE OF CONTENTS
1    INTRODUCTION  	  1
      1.1   What is an Electronic Bulletin Board System ..  2
      1.2   What is the OAQPS TTN	  2
      1.3   Major Features of the TTN  	  4
      1.4   What you need to access the TTN	  5
2     HOW TO USE THE OAQPS TTN	  7
      2.1   Configuring Your System	  8
      2.2   Making  a Connection	  9
      2.3   Logging on for the first time	 10
      2.4   New User Registration	 13
      2.5   Logging on as a registered user	 14

3     SYSTEM FEATURES	'	 15
      3.1   Multiple Bulletin Board Systems 	 16
      3.2   File Transfers	17
      3 . 3   File Transfer Protocols	 17
      3.4   File Downloading	18
      3.5   File Uploading	 22
      3.6   Messages	-.	25
            3.6.1  Private Messages 	 25
            3.6.2  Public Messages	33
      3.7   Utilities	 37
      3 . 8   Online  Conferencing	 39
      3 .9   Data Base Online Applications 	 43
      3.10  Subject Conferencing 	 43
      3.11. Help/Information	44

4     TTN TIME SAVING TECHNIQUES 	 45
      4 .1   Archived Files	46
      4 . 2   Command Stacking	49
      4 . 3   High Speed Modems	 49
      4 .4   Hot Keys, Pause and Stop	 50

5     GETTING HELP  	 51
                            111

-------
                TABLE OF CONTENTS (Continued)










APPENDIX  A:  BBS COMMANDS	  53






     User Profile Configuration Commands	55




     File Downloading Comj»a"dg	59




     Message Entry commands	65



     Message Retrieval Connaandg	69




     Online Conference Commands	  73






APPENDIX  B:  ACCESS THRU ETHERNET AND PORT SELECTORS 	  75






APPENDIX  C:  GLOSSARY OF COMMUNICATIONS TERMS 	  83






APPENDIX  D:  BULLETIN BOARD DESCRIPTIONS 	  89
                             IV

-------
                          SECTION 1


                        INTRODUCTION
     The Office of Air Quality Planning and Standards (OAQPS)
has  been  charged  by  Congress  under the  Clean Air Act to
protect and enhance the quality  of the Nation's  air resources
to promote public  health  and  welfare.   OAQPS is responsible
for   developing   national   programs,   technical   polices,
regulations,  guidelines  and  criteria  for  air  pollution
control.    OAQPS   supports  activities  by  State  and  local
governments for the prevention and control of air pollution.

     The Office of Air Quality Planning and Standards (OAQPS)
Technology Transfer Network  (TTN)  is an electronic bulletin
board system that is  used to facilitate  communications and
disseminate  technical  information  among  EPA  staff,  EPA
Regional Offices,  and  State and  local agencies.  The TTN also
provides communication  and information services  to private
industry,  environmental consultants,  educational institutions
and individuals engaged in environmental issues  and projects.

     This guide describes how  to  access  the OAQPS  TTN and
explains the commands and features  of the system.   The most
recent  version of this   manual  is always  available  for
downloading from  the  System Utilities Menu of the TTN under
the menu item "TTN User's  Manual".   It is located in the file
MANUAL.ZIP.

-------
1.1.
     A  Bulletin  Board  System  (BBS)  is  a computer  system
comprised of hardware  and software that  receives telephone
calls from other  computers.   The BBS concept began as a means
for users to enter  messages and read messages  addressed to
them  by other  users.   Today's BBS performs  a  variety of
services that  include  the  exchange of programs,  software,
databases and files of  all descriptions.  The most important
function of a BBS is to expedite and promote the exchange of
information through easy and friendly access.  Users are free
to visit at their own convenience  to scan messages and pick
those that are of particular interest and exchange information
over long distances  and  at high  speeds.  The configuration of
each  BBS is unique because  of the  variety of  computers,
communications  equipment and software available to develop a
system.
1.2.   WHAT IS THE OAQPS TTN?
     The OAQPS Technology Transfer Network (TTN)  is a multiple
bulletin board system offering  the  caller access to several
technically oriented bulletin boards by dialing only one phone
number.  The network is designed to facilitate communications
and provide access  to information and technology related to
air pollution.    The  purpose of  the  network is to foster
technology  transfer among  all  parties  interested  in  the
solution of the nation's air pollution problems.  The network
is also designed  to be  user-friendly and readily accessible
from anywhere in  the  country.   It is  a  forum for technical
interchange at the  working  level among EPA,  State and local
agencies and the private sector.

      The OAQPS TTN runs on an  AT class microcomputer.   The
computer runs at  33 megahertz  clock speed and  has  over 800
megabytes of disk storage provided  by two hard disk drives.
The hard  disks ara controlled  by  a Small  Computer System
Interface (SCSI)  disk  controller.  The TTN software is the 32
line version of The  Bread Board  System (TBBS), by eSoft, Inc.
The system  can  support  32  users at  one  time simultaneously
downloading the  same  software,  sharing  the  same files and
messages on  the  system.  The system has the capability of
executing online  and  sharing programs written  and  compiled
using a subset of data base computer language code.

-------
     Presently, the Technology Transfer Network is comprised
of the following bulletin boards:
       OAQPS - Office of Air Quality Planning and Standards

       EMTIC - Emission Measurement Technical Information
               Center

       SCRAM - Support Center for Regulatory Air Models

       CHIEF - Clearinghouse for Inventories and Emission
               Factors

       CAAA  - Clean Air Act Amendments

       APTI  - Air Pollution Training Institute

       CTC   - Control Technology Center
     The following are bulletin  boards  that are planned for
the near future:
       AMTIC - Ambient Monitoring Technical Information Center
               To be implemented late 1991.

       AIRS  - Aerometric Information Retrieval System
               Planned for the future.

       NSR   - New Source Review
               Planned for the future.
     See Appendix D, Bulletin Board Descriptions, for a more
detailed description of each BBS presently in the TTN.

-------
1.3.   MAJOR FEATURES 01
     The TTN is a  multi-board  system that supports complete
and separate BBS systems.   The user has  access  to many BBS
systems by  simply dialing  one telephone  number.    The TTN
provides utility features that are  applicable to all boards
but each  BBS  within the TTN  has certain  features that are
unique.  The major features of the OAQPS TTN include:
o    File Transfer;  Each BBS within the TTN has a variety of
     files, programs and databases that can be downloaded to
     a PC.  You can transfer these files from the TTN by using
     an  appropriate  communications software  program  and  a
     modem.  You can also upload files to the TTN for use by
     others.

o    Electronic Messages;  E-MAIL messages are exchanged with
     other TTN users.  Private messages can be exchanged with
     specific individuals that only the  sender and receiver
     can see.  Most  TTN  boards  also  provide  public messages
     that all can read in  order  to promote open discussions
     for  anyone   interested  in  responding   to  technical
     questions and issues pertaining to a particular board.

o    Utilities:  A number of utilities are provided that make
     life easier and fun for the TTN user.  Such things as a
     online registry search, recent callers,  top downloads,
     who else is  on the system and many more items of interest
     are available.

o    Online Conferencing: Callers can  communicate online with
     other callers who  are currently logged on to the system.
     Public and private online conferences are provided.

o    Data  Base  Online  Applications;    A  number  of
     applications are provided that can be executed and
     shared online by TTN users.  These applications are
     data base programs  that  are  written  and compiled
     for real time execution on the TTN.

o    Subject  Conferencing;     On  some   bulletin  boards,
     conferences are provided that are dedicated to a specific
     subject area.  You may exchange messages of interest with
     other members of the conference.

-------
1.4.   WHAT YOU NEED TO ACCESS THE TTN
     There are three basic  components  that  you will need in
order to access the TTN.  You will need the following:
     Personal Computer or Terminal:   Almost any computer or
     terminal will suffice, as  long  as  it can connect via a
     modem  to  a  telephone  line.    Using  a  computer  is
     preferable  to using  a  terminal since  it will  allow
     additional  capabilities  such  as  transferring  files
     between your  computer  and the  TTN.    An AT  compatible
     computer is  recommended  for the highest compatibility
     with the TTN.
     Modem:    A modem  is  used to  connect your  computer or
     terminal to the telephone line.  Almost any 1200 or 2400
     baud modem  will work. Cables  and telephone  jacks  are
     required  to connect  your modem  to  your computer  or
     terminal and to the telephone  system.   Service is also
     provided for 9600  baud modems that  adhere  to the V.32
     standard for 9600 baud modems.
o    Communications  Program;    Communications  software  is
     necessary if you are using a computer to connect to the
     TTN.   Terminals have  built-in communications programs.
     You need to make sure that the communications program you
     select is compatible with your computer and modem.  For
     the highest  compatibility with the TTN, choose a program
     that  can support Xmodem,  Ymodem, Kermit  or Zmodem file
     transfer protocols.   In order to display PC graphics and
     colors  properly  your program  should support VT100  or
     VT102 terminal emulation.

-------

-------
                          SECTION  2


                  HOW TO USE THE OAQPS TTN
     Before connecting to the OAQPS  TTN,  you must first set
certain parameters in your terminal or communications program
so that your system speaks the same language as the TTN.  Most
communications  programs  have  a  "setup"   or  "communication
parameters" screen that allows you to make these settings.

-------
2.1.
CONFIGURING YOUR SYSTEM
     You must set your system to operate at 1200,  2400 or 9600
baud (depending upon your modem's capabilities),  8 data bits,
1 stop bit and no parity.   If you dial up the TTN and receive
unintelligible character strings or  cannot get further than
the initial prompts for  the name and  location you are calling
from,  then it  is very  likely that  one  or  more  of  these
parameters have  not  been  set  correctly in  your  system.   If
this happens, hang up, reset these parameters and dial again.
The following table lists the required and optional parameters
for getting the most out of the TTN display:
  1) Name


  2) Number




  3) Data Bits

  4) Parity

  5) Stop Bit

  6) Emulation




  7) Duplex
          OAQPS TTN
          (919) 541-5742
          (919) 541-1447
          8

          None

          1

          VT100
          Full
Optional; name in your
dialing directory.

Required; 1200/2400 baud
Required; 9600 baud
Use area codes,  "9" or "8"
prefix where appropriate.

Required

Required

Required

Optional;  required to
display PC graphics and
colors, if your system
supports it.

Required
     There are often many other settings that can be made on
a terminal or in a communications program.  The other settings
will most  likely depend on your  computer, modem or your own
personal preferences.

     Computer   communications   is   often   confusing   and
frustrating   even for the experienced  computer  user.   It is
far beyond the  scope  of this document  to cover the cryptic
vocabulary, profusion of parameters and diversity of equipment
possible in this field.   If you are a novice or have trouble
getting  your equipment or  software to work correctly,  we
suggest that you find  someone in  your office who can help you
get through the first session.
                              8

-------
2.2.   MAKING A CONNECTION
     Once you have made the settings as described in the above
section, "Configuring Your System", you are ready to dial up
the TTN. Be sure to  set your modem  to call (919) 541-5742 for
2400/1200 baud or (919)  541-1447 for 9600 baud.

     If your modem  allows you  to monitor the call, you will
hear the number being dialed, one or two rings,  then the phone
being answered, a high-pitched tone (the carrier signal from
the TTN modem)  and another high-pitched tone  (your own modem's
carrier signal).  If you cannot  hear  what is going on, then
wait  patiently; it usually  takes  several  seconds   for  a
connection to be made.

     As  soon  as a  connection is  made,  your  computer will
usually  notify you  with the  message  "CONNECT"  or "CONNECT
2400".  If nothing happens within a  reasonable period of time,
then  hang  up  and return to  the  "Configuring  Your  System"
section above to make sure your communications parameters are
set correctly.  You might also check to see if you are using
the right type of cable to connect your modem to your computer
or terminal and that the modem is  properly  connected to the
telephone system.

     If you hear a busy signal when you dial'in, then all of
the  phone  lines to the TTN  are  already  in  use by  other
callers.  Try calling back in a few minutes.

     If the phone does not answer when you dial in, then the
Board  is most likely not available,  either due  to  routine
maintenance or because of some  unexpected malfunction.  TTN
routine maintenance  occurs  every Monday morning from 8:00 AM
to 12:00 Noon eastern time.  This time  is reserved for system
maintenance and backup.

-------
2.3,
LOGGING ON  FOR THE FIRST TIME
      Once you have successfully connected to the  TTN you will
see  the TTN  "welcome" screen similar  to the  following:
                _OAQPS_
              Technology
                Transfer
                 Network
                  )  *Welcoie to OAQPS Technology Transfer Network*

                               Operated by

                    Office of Air Quality Planning and Standards

                          Environmental Protection Agency



— v—
1 1 J J I I
ft/Iff


++
                           _oo
                           _\
         I -i I XXXXXXXXXXXXXXX XX XX \

        / X X  XXXXXXXXXXXXXXXXX XX XX \
        I	,	,_1r_ L.^nml,^„„____
                          *  Prograi Manager: Jerry Hersch *
                          4         ••••••          4
                          *  Systei Manager: Hersch Rorex *
                          ***********************************

                          Hayes (2400/1200/300): (919) 541-5742
                         Hst Dual Standard 9600: (919) 541-1447
                              Voice/help line: (919) 541-5384
      This  screen  contains  information  that  identifies  the
Program and System managers, telephone numbers for the various
modem speeds  and  where to call  for help.


      After  the welcome screen you will  see the  prompt:


           First Name?
      Respond  to  this   prompt  with  your  real   first  name.
Company or  generic  names  are  not permitted.   Do not use  made
up  names or "handles".  Not following  these  guidelines could
cause your  registration to  be rejected.   Press return after
you have entered  your first name.
                                 10

-------
     The next prompt you see is:


          Last: Name?


     Enter your  real  last name.   It is  important  that you
enter  both  your  first and  last names  accurately  and use
exactly  the  same  name every  time  you   logon  to  the  TTN.
Otherwise, the  TTN will .not find  you in  the user  log of
authorized callers.  For example,  if you logon the first time
as William Smith and the next time as Bill  Smith, the TTN will
take Bill Smith as a new and unregistered user.

     The next prompt is:


          Calling from (City,State)?
     Enter the  city and state  you are calling  from.   This
information  is  stored by  the  system  and is  presented for
verification each time you logon.

     Because this is  your  first time to  logon,  you will be
asked  to  supply  information  about your  computer.    The
"provided" answers to  the following questions assume an IBM PC
or clone:
     # Chars per line on screen(10-132)? 80
     The  following video  terminal  options are  presented.
Enter F if you have an IBM PC or compatible.
     VIDTEX   TRS-80 1/3   ATARI
     H19/H89/Z19  IBM PC   TELEVID 925  VT-100
     Enter letter of your terminal,  if not listed: F
     The System  sets  default values  for  various parameters
based on the terminal or  computer  type that was selected in
the previous question.   If  was  selected,  the following
defaults are set and printed as follows:
                             11

-------
     Terminal Profile Set to:
     ANSI codes Allowed
     IBM Graphics Allowed
     Upper/Lower Case
     Line Feeds Needed
     0 Nulls after each 
     If  these  values are  correct  for  your  computer,  then
answer the next question as follows:
          Do you wish to modify this? N


     For computers  or communications  software that  do not
support ANSI graphics  or IBM graphics,  answer the previous
question with  a  "Y".   As a  result of answering  "Y"  to the
above  question,  a  further  list of  questions  will  follow.
Answer each of  the following questions appropriately for your
particular computer:


          Can your terminal display ANSI codes?


          Can your terminal display IBM Graphics Characters?


     These  settings may  be  changed  at any  time from the
Systems  Utilities  menu  by   selecting  hange  Terminal
Configuration.

     The next two questions determine how menus and text are
presented on the  screen.  The  TTN  menus are designed for 24
line  screen displays.   Answer  the  following  questions  as
follows:


 Do you wish to have a pause after each display page (Y/N)? Y


 How many lines per Display page (10-80)? 24
     The next prompt provides for a password of your choosing
that will be required each time  you logon to the system.  The
prompt is as follows:
                             12

-------
     Please Enter a 1-8 character Password to be used for
     future logons.  This password may contain any printable
     characters you wish. Lower case is considered different
     from upper case and imbedded blanks are legal.  REMEMBER
     THIS PASSWORD.  You will need it to log on again.
     Your Password?
     After you have entered your password, a message appears
stating that  you are caller  number "nnn" and  that you are
authorized 30 minutes for this call.  Unregistered users are
given  30  minutes per call.   A  welcome letter will  now be
displayed, followed by the TTN operating schedule.
2.4.   NEW USER REGISTRATION
     After having completed the events described in the above
section "LOGGING ON FOR THE FIRST  TIME",  you will be in the
Unregistered User's  Main  Menu.    As  an  unregistered user,
access is limited to viewing the descriptions of each TTN BBS,
and browsing in the Systems Utilities Menu.  Registering as a
new user is actually a two-step process.

     First,  you must  provide  the system  with   some basic
information that it keeps  on all callers.  Enter  from the
Unregistered User's Main Menu and respond to the prompts for
Name, Address,  Zip, Telephone, Company,  and Board of primary
interest.   Please,  only specify one  board that  you  have a
primary interest in for your specific needs.  This gives the
systems operators some idea of the  interest that is generated
for  each  BBS.    Once  registered  you  will  have full  and
unlimited access to all BBSs within the TTN usually the next
business day following registration.  Please do not register
more than one time.  Company or generic names are not allowed
and will not be  registered.  When responding to the prompt for
name, enter the same name under which you logged onto the TTN.

     Second, all registrations  are subject  to review by the
systems operator. Registrations are reviewed each working day
morning following the registration day.  Once registration has
been approved,  you will have full access to the TTN.
                             13

-------
2.5.   LOGGING ON AS A R]
     The sequence of  events  when Logging onto the  TTN as a
registered user are much different than  the  first time as a
new  user.    You will  see the  same  "Welcome"  screen that
identifies the Program and System manager, telephone numbers
for the various modem types/speeds and where to call  for help.
You will respond to the following prompts:
          First Name?


          Last Name?


          Calling from (City,State)?


          Password?
     The TTN will recognize you as a registered user, indicate
where  you  are  calling  from  and ask  you  to  verify  your
location.  You will then  be  informed if you have any messages
waiting and at this time  be  given the opportunity to read the
messages or wait until  accessing a private E-MAIL area in one
of the TTN  bulletin boards.   You will  then  be  placed in the
OAQPS TTN Registered Users TOP Menu.  This is the menu in the
system that provides access to all TTN Bulletin Boards and the
Systems Utilities Menu.
                             14

-------
                          SECTION  3



                       SYSTEM FEATURES
     The TTN has  many  features that a beginner  will  not be
familiar with unless he or she has some experience accessing
electronic bulletin boards, especially bulletin boards using
TBBS software  from eSoft, Inc.   The commands  available in
bulletin board  software  are  not exactly the  same  for every
system in today's market.   However, once familiarity has been
gained with one particular system, commands can be related to
those of another.
                             15

-------
3.1
MULTIPLE BULLETIN BOARD SYSTEMS
     The TTN is a multiple bulletin board system.  The system
is presently comprised of seven BBSs.  Not all of the features
described in this section are supported within each BBS since
some may not  be appropriate to the  functions  of  a specific
BBS.  The TTN provides access to all  BBSs under one telephone
number.  The TTN Top Menu provides access to each BBS within
the TTN and the structure of the menu is as follows:
         OAQPS TTN
                 REGISTERED USERS
TOP MENU
           **  OAQPS TTN Bulletin Board Systems  **
                       OAQPS
                   <2> EMTIC
                   <3> SCRAM
                   <4> CHIEF
                   <5> CAAA
                   <6> APTI
                   <7> CTC
                            <8> AMTIC
                      BBS Descriptions
                      ystem Utilities
                      nline Conference
                      mail
                      oodbye
     The  Structure of  this  TOP MENU  will  change  as  new
bulletin boards are added to the TTN.
                             16

-------
3.2.   FILE TRANSFERS
     Transferring  files  between  your computer  and  TTN is
called "downloading"   and "uploading".   Downloading occurs
when you request TTN to send a file "down" to your computer.
Uploading occurs when you send a file from your computer
"up" to TTN.
3.3.   FILE TRANSFER PROTOCOLS
     File transfer protocols (methods) defined and available
in  communications  software  programs  provide  a means  for
transferring  files  while  communicating  with  various other
computers.  Protocols provide  a  common denominator for file
transfer.  Both sending and receiving computers must use the
same protocol for transferring files.   The TTN provides the
following commonly used file transfer protocols:
                    XMODEM
                    YMODEM
                    KERMIT
                    SuperKERMIT
                    ZMODEM  *
* Note: ZMODEM to be incorporated in the next version of TBBS
software due in the fall of 1991.
     See Appendix  A,  BBS Commands,  under  "File Downloading
Commands" for  a  description of each file  transfer protocol
option and the use of each protocol that'is available on the
TTN.
                             17

-------
3.4.
FILE DOWNLOADING
     There are two steps  involved  in  file downloading.  The
first step involves setting up the TTN to send a  file you have
chosen to download.

     The  second  step  involves  setting  your communications
software to receive the file.   The second step is unique to
you-r software.   The  keystrokes involved  in  setting  up your
software to receive a  file vary according to the particular
communications software you are using to connect to the TTN.
Consult your communications software manual for instructions.
     The two  steps  required for  downloading are  outlined
below:
Step 1 - Setting TTN to send a file
     Select a file you wish to download  from one of the TTN
download directories.  The following download directory is a
typical directory from which a file can be downloaded:
                      Regulatory Models
 Programs and instructions for dearchiving compressed files
 can be found via ystems Utilities from the Top menu under
 rchivers/dearchivers.
  NAME
        Bytes
Date
BLP.ARC
CALINE3.ZIP
COM2.ARC
CRSTER.ARC
EKMA1.ARC
EKMA2.ARC
EKMA3.ARC
ISCLT.ARC
ISCST.ARC
MPTER.ZIP
RAM.ARC
290682
52564
113441
141579
175440
143737
286553
240408
199685
109979
210913
3/30/90
6/13/91
5/08/89
2/21/90
6/06/90
3/27/90
6/06/90
1/10/90
2/12/91
4/16/91
1/24/90
          Description

PC version EXE included.
PC version EXE included.
PC version EXE included.
PC version EXE included.
EKMA source/test cases.
EKMA PC EXE file.
EKMA Input Generator.
PC version EXE included.
PC version EXE included.
PC version EXE included.
PC version EXE included.
ownload, 

rotocol, xamine, ew, elp, or ist Selection or to exit: 18


-------
     Before downloading  a file  you must choose  a download
protocol as discussed in  section 3.3*   If you wish, you may
set  a  download  default   protocol  such  that  each  time  you
download a file the TTN will  not  ask what protocol  to use and
will always use your default  protocol.  Default protocols can
be  set  from   the  Systems  Utilities  Menu  under   "hange
Terminal   Configuration".     All  of   the  user  profile
configuration  commands  are  discussed  in  Appendix A,  BBS
Commands, under User Profile Configuration Commands.

     If  you   have   already   set  a  default  protocol  for
downloading, simply  type  the name  of  the file you want to
download  and   the  TTN will  give  an estimate  of  the  time
required to download the  file  and will be ready for a start
signal from your communications  software.  If not, type the
name of the file and TTN will present the following protocol
menu from which you must choose a protocol that your software
supports:
     Select from the following transfer protocols:

     1 - TYPE file to your screen
     2 - ASCII with DC2/DC4 Capture
     3 - ASCII only, no Control Codes
     4 - XMODEM
     5 - YMODEM/YMODEM-g
     6 - YMODEM/YMODEM-g Batch
     7 - SEALINK
     8 - KERMIT
     9 - SuperKermit (Sliding Windows)

     Choose one (Q to Quit)? 4
     The above example shows XMODEM as the download protocol
selected as a result  of  entering "4".   TTN provides command
stacking, which means  that multiple commands can be entered on
the same line separated  by  spaces.   This eliminates some of
the keystrokes  involved  in  setting  up  files for downloading
when a  default protocol has not been  set.   The  following
statement is an example of command stacking that will prepare
the TTN to downlead a file  using the XMODEM protocol when a
default protocol is not in effect:

The "P" in the above command line is the command for a transfer protocol selection from the protocol menu. The 4 selects protocol number 4, which is XMODEM, from the protocol menu. 19


-------
Step 2 - Setting your software to receive a file
     After step one has been completed, you will be given an
estimate of the  time  required  to  download at the baud rate
you are connected.   A message will  indicate that the download
process is awaiting a  start  signal from your communications
software:
  (Awaiting Start Signal)
     At  this point  you  must  prepare  your  communications
software to receive a file using  the  same protocol that you
selected from the TTN protocol menu or your default protocol.
The procedure for doing this  requires  familiarity with your
software.   You  should refer  to your documentation,  user's
guide or reference manual  for instructions pertaining to your
particular software.

     The following are provided  as examples of the keystrokes
required  for setting  up  PROCOMM  or  PCPLUS and  CROSSTALK
(XTALK) to receive files:
*** THE KEYSTROKES REQUIRED TO DOWNLOAD FOR PROCOMM OR PCPLUS:
   Press the  "page down" key on your keyboard. The
              PROCOMM protocol  menu is displayed.  Select the
              same protocol you selected from the TTN protocol
              menu and press .

     If you have chosen  KERMIT as your transfer protocol, the
download begins and upon completion the  file will appear in
the PROCOMM or PCPLUS directory of your computer.

     If you have  chosen XMODEM or some  other protocol that
allows file renaming or file redirection,  you will be prompted
for a file name.  At this time, if you wish, you can enter a
path to direct the file to some other drive or directory.  The
following prompt appears:
                             20

-------
                 Receive XMODEM
               Please enter filename:
     The following  statement  would direct the  file to your
floppy drive A:

*** THE KEYSTROKES REQUIRED TO DOWNLOAD USING CROSSTALK ARE:
   Press the Home Key on your keyboard
     CROSSTALK responds with a command prompt at the bottom of
your screen in the form of a question:  "COMMAND?"
     CROSSTALK command to receive using XMODEM
                              or
     CROSSTALK command to receive using KERMIT
     If you have chosen KERMIT as your transfer protocol, the
download begins and upon completion  the  file will appear in
the CROSSTALK directory of your computer.

     If you have chosen XMODEM as your download protocol, you
will be prompted for a file name and you can specify another
drive  or  directory  by including   a  drive  letter  and/or
directory name.  For example: a:\mydir\file.ext.

     See Appendix  A,  BBS Commands,  under  "File Downloading
Commands" for a description of each file downloading command.
                             21

-------
3.5.   FILE UPLOADING
     There are two  steps involved in uploading  a file from
your computer to  the TTN. The first step involves setting up
the TTN to receive a file you want to upload.

     The second step involves setting up your communications
software to send the file.   The  second  step is unique.  The
keystrokes involved in setting up your software to send  a file
varies according to the particular communications  software you
are using to connect to the TTN.
      The two  steps required for uploading are outlined below:


Step 1 - Setting up the TTN to receive a file
     You must use one of the appropriate upload areas provided
on the TTN.   Each BBS that permits uploads has provided a menu
key for uploading.   Press the appropriate key provided on the
upload menu  in  order to  activate the upload process.   The
following prompt will be displayed on your screen:
             "Enter a 1-12 character file name:"
     At this prompt enter a  name  that you want your file to
have when uploaded to  the TTN.  The file name must conform to
the DOS file naming convention of not more than 8 characters
for the  file name and  not more  than 3 characters  for the
extension name,  (example:  myupload.txt).   The  TTN  will now
prompt for a description of the file you are uploading.  The
following prompt will be displayed on your screen:


           "Description of file (40 characters max)"


     After you have entered the description, the TTN protocol
menu will be displayed if you have not set a default protocol
for uploading files.  You will then  choose the protocol you
wish to use  for the upload.  This  must be a protocol that your
software supports.
                             22

-------
     Select from the following transfer protocols:

     1 - Prompted ASCII
     2 - ASCII, XON after  rcvd
     3 - ASCII, XOFF/XON flow control
     4 - XMODEM - Checksum
     5 - XMODEM or YMODEM - CRC
     6 - YMODEM Batch
     7 - SEALINK
     8 - KERMIT
     9 - SuperKermit (Sliding Windows)
     A - YMODEM-g Batch

     Choose one (Q to Quit)? 4
     The above  example  shows XMODEM as  the  upload protocol
selected as a result of entering "4".
Step 2 - Setting your communications software to send a file
     At this point the following message will be displayed:


               File open, ready to receive
               (Ctrl-X to abort)
     You are now ready to prepare your communications software
to send a file using the  same protocol that you selected from
the TTN protocol  menu.  The procedure for doing this reguires
familiarity with  your  software.  You should  reference your
documentation, user's guide or reference manual for
instructions pertaining to your particular software.

     The following are  provided as examples of the keystrokes
reguired  for  setting  up PROCOMM  or  PCPLUS  and  CROSSTALK
(XTALK) to send files:
*** THE KEYSTROKES REQUIRED TO UPLOAD FOR PROCOMM OR PCPLUS:
   Press the "page up" key on your keyboard.  The
            PROCOMM protocol menu will be displayed.  Select
            the same protocol you selected from the TTN
            protocol menu.
                             23

-------
     If XMODEM was selected, the following prompt will appear:
                    Send XMODEM
                  Please enter file name:
     If KERMIT was selected, the following prompt will appear;
               [.   — Send KERMIT =====

                  Please  enter file spec:
»
    Enter the drive, directory and name of the file
            you are uploading, where c=drive, d=directory,
            f=filename.  For example, c:\ulist\ups.rpt will
            upload the file  ups.rpt from your C drive in your
            ulist directory.
*** THE KEYSTROKES REQUIRED TO UPLOAD USING CROSSTALK ARE:
   Press the Home Key on your keyboard

CROSSTALK responds with a command prompt at the bottom of your
screen in the form of a question:  "COMMAND?"

     CROSSTALK command to send a file using XMODEM
                              or
     CROSSTALK command to send a file using KERMIT
     If you have chosen KERMIT as your transfer protocol, the
following prompt will appear:

         (KERMIT) Enter name of file to transmit:

     If you have cnosen XMODEM as your transfer protocol, the
following prompt will appear:

         Enter name of file to Xmodem transmit:

     Enter the drive, directory and name of the file you are
uploading to the TTN.
                             24

-------
3.6.
MESSAGES
     Message service is provided for TTN users in the form of
electronic mail.   Both private  and  public messages  can be
exchanged between TTN users.  Private messages are exchanged
between two registered  users that only the sender and receiver
can see.  Public messages can be read by any registered user
of the system.  See Appendix A, BBS Commands, under "Message
Entry  Commands"  and  "Message Retrieval  Commands"  for  a
complete set of commands covering message options.
3.6.1   PRIVATE MESSAGES
     Private E-MAIL is universal to the TTN and can be sent to
any registered user regardless of which board  (SCRAM, EMTIC,
etc.) the user finds of primary  interest.   E-MAIL menus are
accessible from the main menu of each BBS that provides E-MAIL
service, usually under "PUBLIC COMMUNICATIONS".   E-MAIL can
also be  sent  or  read from the TTN  Top Menu.  The  keys for
selecting e-mail options may vary from BBS to BBS,  but will
have a similar appearance as follows:
                     ELECTRONIC MAIL
           can Mail
           ead Mail
            Send Mail
           oodbye
           <-> Return to Hain menu
                             25

-------
                 Scanning Private E-MAIL
     To scan E-MAIL enter  and the system will respond with
a list of scan options as follows:
     Scan Electronic Mail:
     o you
     rom you
     oth To and From you
     bort Scan

     Which One?
     You can  scan  messages addressed to  you,  messages sent
from  you or  both  by entering  the  appropriate  letter  as
indicated above. A scan will display who the message is from,
who it is to and the subject.  When you select a scan option
the system responds with:
     Mark for later Retrieval?
     If  your  response  is  "N",  the  system displays  your
messages according to the option you have selected.


     If  your  response   is   "Y",  the  system  will  ask  an
additional  question  after   each  message  is  displayed  as
follows:
     Mark(Y/N/S)?
     You then have the option to mark the message by entering
"Y" or  not  marking the message by entering  "N"  or stop and
exit the message display mode by entering "S".
                             26

-------
                 Reading Private E-MAIL
     To read  private E-MAIL enter   and the  system will
respond with a list of options as follows:
     Read Electronic Mail:
     o you
     rom you
     oth To and From you
     arked Mail
     bort Reading Mail

     Which One?
     The  option will display  marked messages.   Messages
are marked either manually by the "Mark" option on a scan as
discussed   under  "Scanning   Private   E-MAIL"   above   or
automatically if you receive a "message waiting" notification
at logon.  Marks remain for the entire online session.

     Note the options available for private mail are addressed
to you  or  from you.    This differs from  the  public message
board where  all  messages  can be read in  forward or reverse
order.

     After  a message  has  been  read,  the  following command
options are available as follows:
     wd, elete, gainf eply, ext, or top?
          wd    - forwards the message to another
                     registered user on the TTN E-MAIL message
                     board "MAILBOX" or choose from a list of
                     public message boards
          elete - deletes the message
          gain  - displays the message again
          eply  - responds to the author of the message
          ext   - goes to the next message
          top   - stops reading your messages
                             27

-------
                 Sending Private E-MAIL
     To send Private E-MAIL to another user enter  and the
system will respond with:
     Who is the message to?
     Enter the registered  user's  name for whom  you want to
send mail and the next prompt from the system is:
     What is the subject?
     Enter the subject of the message.  The system will then
echo the inf .rmation you just entered, for example:
     To:  JOHN SMITH
     Subj:  EMAIL
     The system will then ask  if  the  information is correct
and provide an opportunity to change your inputs.
     Is this correct(Y/N)?
     Once you have verified the  information  is correct, the
system will ask  if your message has been prepared off-line and
you want to upload it rather than composing it on-line.  The
prompt is as follows:
     Submit Prepared Text(Y/N)?
     If you  hava  already prepared  text for a  message,  for
example on a floppy disk, you  can  upload that text into the
message area.  The text must be in ASCII  format.  If you have
prepared text and respond with  "Y" to the above question, the
TTN will prompt you for an upload protocol as follows:
                             28

-------
     Select from the following transfer protocols:

     1 - Prompted ASCII
     2 - ASCII, XON after  rcvd
     3 - ASCII, XOFF/XON flow control
     4 - XMODEM - Checksum
     5 - XMODEM or YMODEM - CRC
     6 - YMODEM Batch
     7 - SEALINK
     8 - KERMIT
     9 - SuperKermit (Sliding Windows)
     A - YMODEM-g Batch

     Choose one (Q to Quit)? 8

     Protocol=KERMIT

     File open, ready to receive
     (Ctrl-X to abort)


     At this point, prepare  your  communications software to
upload a file just as  you would with  a normal upload.  If you
are using PROCOMM,  for example,  press the  "PAGE  UP"  key on
your keyboard.   PROCOMM will respond with  a  protocol menu.
Select the same protocol that you have chosen from  the BBS, in
this example case, KERMIT.   You will then be  asked to enter
the location of the file  you  want to  send from your computer.
     If you  want  to compose  a message  on-line,  which  is
usually the  case,  enter "N",  and the  system  invokes  the
message editor as follows:
     Enter text of message
      by itself ends input

     01:
     The system provides word wrapping very similar to a word
processor.   Compose your message and enter  by itself on
a  blank  line  and the  system  responds  with  the  following
prompt:
ist, iew,  ont,  dit,  cpt, ile,  ave,  or
uit?
                             29

-------
     These options are explained in detail in Appendix A, BBS
Commands, under  "Message  Entry Commands".    However,  to be
notified  that  the  recipient of  the message  has  read  the
message, enter  for a return receipt.

     To send your message enter  and your message will be
saved on the system disk and  the person  to whom you addressed
the message will  be notified the next time he/she logs on that
a message is waiting to be read.

**** Note: If  is not entered the message will not be sent
and the person to whom you addressed the message will not be
notified.  In future upgrades to the system, this prompt will
be changed to end.
                 Sending Carbon Copies (CCs)
     You can send the same message to more than one registered
user by using the CC command.  The CC command does not appear
as an option on the prompt  line.  Rather, it must be typed on
the first line of the message.

     The proper  CC  command format  is:  cc:  namel,name2,....,
where namel, etc. is the name  of the intended recipient(s) of
your message.  Please  note  that you must leave a space before
the first name.  The first line of your message could
look like this:
                 01: cc: Jimmy Smith,John Doe
                             30

-------
                 Enclosing a file with a message
     The  ile  option provides  a  method of  enclosing or
attaching a file with your private message.  The file can be
any type of file, ASCII or non-ASCII.   In order to use this
feature, prepare a message as described under "Sending Private
E-MAIL" above  and  select ile  from the prompt  line.   An
example of  the questions with  typical answers  is given as
follows:
     Enclose a file with this message(Y/N)? Y
     Enter 1-12 char full file name: MYFILE.TXT

     Select from the following transfer protocols:

     1 - Prompted ASCII
     2 - ASCII, XON after  rcvd
     3 - ASCII, XOFF/XON flow control
     4 - XMODEM - Checksum
     5 - XMODEM or YMODEM - CRC
     6 - YMODEM Batch
     7 - SEALINK
     8 - KERMIT
     9 - SuperKermit (Sliding Windows)
     A - YMODEM-g Batch

     Choose one (Q to Quit)? 8

     Protocol=KERMIT

     File open, ready to receive
     (Ctrl-X to abort)
     At this point, prepare  your communications software to
upload a file just as  you would with a normal upload.  If you
are using PROCOMM,  for  example,  press the  "PAGE  UP"  key on
your keyboard.   PROCOMM will respond with  a  protocol menu.
Select tha same  protocol that you have chosen from  the BBS, in
this case,  KERKZT.   You will  then be  asked to  enter the
location of the  file you want to send from your computer.  The
prompt and response will look similar to the following:
          Please enter file spec: C:\MYDIR\MYFILE.TXT
     After the upload is complete, you must then enter  for
save (send) the message that will carry your enclosed file.

                             31

-------
     The next time the addressee logs on to the TTN, he will
be notified that a message is waiting similar to the following
example:
Msg#:  887 *MAILBOX*
08/13/91 14:54:35
From: John Brown
  To: Jim Smith
Subj: Data Case
Jim, I have enclosed the data  case  you requested, hope this
will solve the problem.   -John-

*Enclosed File: myfile.txt

wd, elete,  nclosure,  gain, eply,  ext,  or
top?
     The addressee enters   and  the  TTN download protocol
menu appears as follows:
     Select from the following transfer protocols:

     1 - TYPE file to your screen
     2 - ASCII with DC2/DC4 Capture
     3 - ASCII only, no Control Codes
     4 - XMODEM
     5 - YMODEM/YMODEM-g
     6 - YMODEM/YMODEM-g Batch
     7 - SEALINK
     8 - KERMIT
     9 - SuperKermit (Sliding Windows)

     Choose one (Q to Quit)? 8

     Select a protocol, for example, KERMIT and the TTN will
respond as follows:

     Protocol=KERMIT    File myfile.txt,     500 Bytes
     Est. Time:    0 mins, 02 sees at 2400 bps

     Awaiting Start Signal
     (Ctrl-X to abort)

     At this point, prepare  your  communications software to
download a file.  If you are using  PROCOMM,  for example, press
"PAGE DOWN" and the enclosed file will be downloaded to your
PC.
                             32

-------
3.6.2   PUBLIC MESSAGES
     Public messages differ from private e-mail in that they
can be read by all registered users and the  addressee does not
have to be a registered user.  For example, a public message
can be addressed to "ALL"  or "ANYBODY".   It is not restricted
to  a  certain  individual.    Public message  menus are  also
accessible from the  main menu  of each BBS usually  under
"PUBLIC  COMMUNICATIONS".    The  keys  for  selecting  public
messages may vary  from BBS to BBS, but  will  have a similar
appearance as follows:
                     PUBLIC MESSAGES
           can Public Message Headers
           ead Public Messages
           eave Message on Public Board
           oodbye
           <-> Return to Main menu
                 Scanning Public Mail
     To scan public mail enter  and the system will respond
with a list of scan options as follows:
     oward Scan
     everse Scan
     ew Message Scan
     elective Scan
     bort Scan

     Which One?
     You can  scan messages  in  a forward  direction (oldest
first), reverse direction (latest first), new messages since
the last time  you were  on TTN or selective  by  (from,  to or
subject) .   A scan  will display who the message is from, who it
is to and  the  subject.

                             33

-------
       oward Scan

       everse Scan

       ew Message Scan

       elective Scan

       bort 'Scan
Scans message headers beginning
with the first message
Scans message headers beginning
with the latest message
Scans message headers after your
last time on TTN
Scans message headers selected
by rom, o, or ubject
Exit Scan options
     Public messages can also be marked manually by the "Mark"
option on a scan as  discussed under "Scanning Private E-MAIL"
and then read using the arked Messages command when reading
public mail.
                 Reading Public Mail
     To read public mail enter  and the system will respond
with a list of options as follows:
     orward or everse Multiple
     ew Messages
     arked Messages
     elective Retrieval
     ndividual Message(s)
     bort Retrieve

     Which One:
      orward

      everse Multiple

      ew Messages

      arked Messages

      elective Retrieval


      ndividual Message
- reads messages starting with
  the first message on the board
- reads messages starting with
  the latest message
- reads messages after your last
  time on TTN
- reads messages marked using the
  mark feature during  a scan
- reads messages selected by
  fields: (from, to, subject or
  text string)
- displays a message by
  specifying the message number
                             34

-------
                 Sending Public Mail
     To leave a message on the public message system enter 
and the system will respond with:
     Who is the message to?
     The response  can be a  registered user's name  or some
generic name  such  as "ALL",  "EVERYONE",  "ANYONE"  since the
message can be read  by all  users.   The next prompt from the
system is:
     What is the subject?
     Enter the subject of the message.  The system will then
echo the information you just entered, for example:
     To: ALL
     Subj: ENVIRONMENTAL PROBLEMS
     The system will then  ask if the information is correct
and provide an opportunity to change your inputs.
     Is this correct(Y/N)?
     Once you have verified  the information is correct, the
system will ask  if your message has been prepared off-line and
you want to upload it rather than composing it on-line.  The
prompt is as follows:
     Submit Prepared Text(Y/N)?
     If you  have already prepared  text for a  message,  for
example on a  floppy disk, you can respond with "Y"  and the TTN
will prompt you for an upload protocol and you can upload text
that you have previously prepared for your message.

     If you  want  to compose  a message  on-line, which  is
usually the  case,  enter "N",  and  the system invokes  the
message editor as follows:

                             35

-------
     Enter text of message
      by itself ends input

     01:


     Compose the message and enter a  by itself on a blank
line.  The system responds with the following prompt:


     ist, iew, ont, dit, ave, or uit?
     These command options are explained in detail in Appendix
A, BBS Commands, under "Message Entry Commands".
     To send your message enter  and your message will
saved on the system disk.
be
**** Note:  If   is not entered the message will not be sent.
In future upgrades  to  the  system, this prompt will be changed
to end.
                             36

-------
3.7.
UTILITIES
     A special menu accessible from the TTN TOP Menu entitled
SYSTEM UTILITIES, provides a number of  useful utility options
that make the TTN user friendly, and fun to operate.  Key an
'S'  from the  TTN TOP  Menu and  the  System  Utilities  Menu
appears as follows:
                     SYSTEM UTILITIES
ystem Information
ecent Callers
 Chat with SYSOP
hange Terminal Config
 Top Downloads
rchivers/Dearchivers
 TTN User's Manual
ime Remaining
ho else is on
eave SYSOP a Message

Change Password ser Registry elp Down/Uploading oodbye <-> Return to Top Menu The utilities that are available and their selection keys are presented with a brief description as follows: ystem Information Displays the hardware and software configuration of the TTN. ecent Callers Displays the last 127 callers to the system. Chat with SYSOP Pages the SYSOP; if he is available he will respond, and you can communicate online. hange Terminal Config This option allows you to change your user profile. Refer to Appendix A, BBS Commands, under "User Profile Configuration Commands" for a complete detailed description of options that can be modified. 37


-------
 Top Downloads

Displays the most  frequently  downloaded files from the TTN.
This display is updated weekly.

rchivers/Dearchivers

Displays instructions and provides the programs necessary to
dearchive  files  that  are downloaded  from the  TTN , in our
archived (compressed) format.

 TTN User's Manual

TTN user's manual in WordPerfect format.

ime Remaining

Displays the time remaining in your current session.

ho else is on

Displays other users who are currently on the system.

eave SYSOP a Message

Provides the option  for sending  a  message  to  the TTN SYSOP.
In order to  send a  message to a sysop of  a  particular BBS
within TTN,  address the  message to  the  person  whose  name
appears at the top of the main menu for that BBS.

Change Password Change and verify your password. ser Registry Displays or searches the system file of registered users. This file is updated weekly. elp Down/Uploading Displays help screens for downloading and uploading with instructions for two leading communications software programs, Procomm and Crosstalk. 38


-------
3.8.
ONLINE CONFERENCING
     Online  conferencing   provides  TTN  users   with  the
capability  to  communicate  with  other  TTN  users who  are
currently using  the  system.  A conference  area is provided
where  users can  talk  to each  other  by typing  from their
keyboard rather  than the spoken words.   You  can access the
online conference menu  by entering  from the  TTN TOP Menu.
The online conference menu will appear as follows:
                     ONLINE CONFERENCE

This area of the TTN provides callers with online conferencing
capabilities.   Callers can  communicate with  other callers
currently online.  Conferences can be either public or private.
BEFORE JOINING A CONFERENCE FOR THE FIRST TIME,  READ AND PRINT
(PRINT SCREEN) THE INFORMATION PROVIDED UNDER <1> "HOW TO JOIN
A  CONFERENCE" AND  <2>  "CONFERENCE COMMAND DESCRIPTIONS".
Entering <3> will  place you in a conference area that requires
a /Quit command to exit.
            <1> How to Join a Conference
            <2> Conference Command Description
            <3> Join a Conference
            oodbye
            <-> Return to Top Menu
     You can join a conference by entering <3> from the above
menu for  online  conferencing.  This places you  in  a public
conference.  The  commands  available to you in  a conference
must be preceded by the /  character.   To leave  a conference
enter /q.
Example: entering the conference area and inviting another
         user to join in a conference.
Enter <3> from Conference Menu.

Your are now in the public conference area.
                             39

-------
Enter:  

     This command lists the names of those users currently in
the public conference area.  At this time, if you so desire,
you can begin to communicate with those conferees.   If no one
is currently  in the public conference then  the  system will
provide a list of the names and line identifications for all
users presently  on  the system.   This provides you with the
information necessary  to invite one  of  these users  into a
public conference with you.

     Suppose your name is Bob Blake and you are currently on
line 3  of the TTN. The  system will present the information to
you in a form similar to the following:
Line 1: JOHN SMITH; AUSTIN, TX
Line 2: JIM JONES; NEW YORK, NY
Line 3: BOB BLAKE; DURHAM, NC
     You see that John Smith is on line 1 and you would like
to talk about a modeling issue.  Send John a message similar
to the following where the "s" stands for "send" and the "1"
identifies the line he is on:
Enter:  /s,l    Hi  John,  would  you  like to  join  me  in  a
conference?  Let's talk about models.  Just enter the online
conference area from the TTN Top Menu.
     At this point John needs to enter the online conference
area by pressing 3 from the TTN TOP Menu.  He is- immediately
in the public conference area with you.

     When John  enters  the conference  area,  you will  see a
message that John has entered the public conference.  Anything
that you type,  John will see prefixed by your line number and
name.
                         Example:


          (3:BOB BLAKE) John,  I see you are in the conference
area.
     Anything that John  types  you will see  prefixed by his
line number and name.
                             40

-------
discuss?
                         Example:


          (l:JOHN SMITH)  Hi Bob, What  issue do we  need to
     If you want complete privacy between you and John so no
one else can  see  what you type, then  you  both must use the
/private command.
     You would:


Enter: 


     John would:


Enter: 
     If you  want  to  be  assured  that  you will  receive no
messages from a particular line, then use the /ignore command.
                         Example:


Enter: 
-------
     John would:


Enter: 

     See Appendix A, BBS  Commands,  under "Online Conference
Commands" for detailed descriptions of all online conference
commands.
                             42

-------
3.9.   DATA BASE ONLINE APPLICATIONS
     The TTN provides a platform from which data base compiled
programs can be executed and shared online by TTN users.  Some
of  the  Bulletin Boards  Systems within  TTN have  data base
applications.  These applications are data base programs that
are written and compiled for real time execution on the TTN.
Within  the  Control Technology Center  (CTC)  BBS  there  are
examples of these applications.  This BBS provides an online
data base  program  that users  can  interactively fill  in an
electronic form for ordering CTC documents.
3.10.   SUBJECT CONFERENCING
     Subject conferences are special areas where callers with
special interests can maintain a continuing dialogue.  This is
an open forum for the exchange of information,  a place to seek
help on special topics.  Subject conferences are provided in
a  form similar  to,  or in  the same  structure  as a  public
message area for anyone who  has  a special interest.  Messages
are left for others to  read and respond to at a later time.
This differs  from online conferencing  which allows  one to
talk, by typing, to someone  else who is currently logged onto
the TTN.  These subject conferences are sometimes referred to
as Special Interest Groups  (SIGS) on  some  BBS systems.   The
SCRAM BBS, for example,  has  subject conferences for a variety
of  subjects  covering  modeling  issues  such  as Air  Toxics,
Complex Terrain, etc and is found in the Public Communications
Section of the BBS under Modeling Conferencing.
                             43

-------
3.11.   HELP/INFORMATION
     A major source of help and information on the TTN is in
special bulletins.  Most boards provide bulletins  in the form
of text  files that may be read  on  line or  downloaded for
future  reference.    A  variety   of  special  bulletins  are
available to provide  current  information  on a wide range of
topics such  as computers, software, hardware,  models, test
methods,  -emission factors and training.

     News items are provided so the caller can discover what
is  new  on   each  BBS.    News items  include schedules  of
conferences,   meetings,  workshops, \  technical   news  and
newsletters.  You can register for newsletters and mail from
each BBS that provides publications on a regular basis.
Ordering information is available for technical publications
that includes EPA document and publication numbers.

     Files containing personal contacts are  available to keep
the caller informed concerning who has responsibility,  or who
is a key person that  can be  contacted  for certain technical
areas. These files can be printed  on the screen or downloaded
for future reference.

     An Alert Section  is provided  at the beginning of some of
the bulletin boards that get your attention and point you to
bulletins that give more  detail on the  help and information
that should be conveyed to you in order  to  keep you abreast of
the changes  that may have taken place since your last session.

     Help can be selected from any command line where elp
is a part of  that command line. There are  two  other important
help  files  that are  accessible  from the  Systems Utilities
Menu.  The first contains instructions  for dearchiving files
downloaded from  the TTN  that are archived  (compressed)  in
order to save  space and  time.   This  help  file  is entitled
"DEARCH.TXT" and is presented*in a download directory when you
select rchivers/Dearchivers  from the  Systems  Utilities
Menu.    The  second  help file   contains   instructions  for
downloading  files from  the  TTN  using two  of the  leading
communications software programs.   This  file is  printed to
your screen when you select elp Downloading/Uploading.
                             44

-------
                          SECTION  4
                 TTN TIME SAVING TECHNIQUES
     After you gain familiarity with the commands on the TTN,
you will discover ways to optimize your time and minimize your
long-distance charges.   Some of the  time  saving techniques
that are available  are provided to you in the form of archived
files, stacked commands and high speed modems.
                             45

-------
4.1.   ARCHIVED FILES
     Many  of   the   files  available   in   the  downloading
directories  are compressed  to  conserve  space  and  reduce
transmission time.   In most cases, multiple files are packed
into  a  single  library  archive.   These file have  the file
extension names of "ARC"  or  "ZIP".   When you download them,
they must be  unpacked and restored, an operation that requires
a utility program "ARCE.COM"  for  "ARC" files and "PKZ110.EXE"
for "ZIP" files.  These dearchivers are found in the Systems
Utilities Menu under rchivers/Dearchivers. The dearchiving
instructions  included  in the  help  file  "DEARCH.TXT"  are
presented below:
                 Dearchiving Instructions


     Files  available  for  downloading   from  TTN  that  are
identified as  ZIP  or ARC by their  file  name  extension have
been  archived  (compressed) to  save  space  and  time  during
downloading.   After  a archived file  has  been  downloaded it
must then be dearchived (decompressed) on your system, before
the programs and/or data comprising that file can be used.

     The program that  is  needed to  dearchive  "ARC" files is
named "ARCE.COM".  The  documentation  for "ARCE.COM"  is in a
file  named  "ARCE.DOC".   The   "ARCE.COM"   program  can  be
downloaded and used as often as necessary to dearchive "ARC"
files downloaded from the TTN.

     The program that  is  needed to  dearchive  "ZIP" files is
inside a file named "PKZ110.EXE".  This file  is different from
ARCE.COM  because  it  is  itself  an archived  file.    After
downloading  "PKZ110.EXE"  to your hard drive,  type PKZ110 at
the DOS prompt  and  the programs and  documentation included in
"PKZ110" will be generated on your hard drive. You will find
a program  named  "PKUNZIP.EXE"  among  the  files  generated on
your hard drive.  This  is the program needed to dearchive "ZIP"
files.  Also, documentation and other  supporting programs are
generated or. vcur hard drive as a result of the execution of
PKZ110.EXE.  The  "PKUNZIP.EXE" program can be used as often as
necessary to dearchive "ZIP" files downloaded from the TTN.
                             46

-------
     Once you have "ARCE.COM" and "PKUNZIP.EXE" stored on your
system,  you  are  ready  to  dearchive  any  compressed  files
downloaded from the  TTN.   For example,  if you have downloaded
a file named "ISCST.ARC" and a file named "BLP.ZIP"  from the
TTN and they reside  in the same DOS drive and directory as the
"ARCE.COM" and "PKUNZIP.EXE" you would  dearchive each file as
follows:
                    ARCE iscst.arc

                    PKUNZIP blp.zip
     If the files are not in the same DOS drive and directory,
a path must be included to point to the location of the files.
For example, if "ISCST.ARC"  and "BLP.ZIP"  are downloaded to
your  "A:"  floppy drive,  you would  dearchive each  file as
follows:
                    ARCE a:iscst.arc

                    PKUNZIP a:blp.zip
  *** ARCE is a copyrighted product of Systems Enhancement
      Associates, Inc.
  *** ZIP  is a copyrighted product of PKware, Inc.

EPA has a site license to distribute ARCE and ZIP for use by
registered  bulletin  board  users   for  dearchiving  files
downloaded from the TTN.
                             47

-------
                 File Naming Conventions
     The  files  on  the TTN  conform  to  the  DOS  file  name
convention that  includes a name and three character extension.
The extension serves to identify the type of file as presented
below:

     .ARC  -  Files that have been archived using the ARC
              archiver.  ARC'ed files  can contain any type of
              file or mixture of various  types of files.
              ARC'd files are dearchived  using the ARCE
              dearchiver.

     .ZIP  -  Files that have been archived using the ZIP
              archiver.  ZIP'ed files  can contain any type of
              file or mixture of various  types of files.
              ZIP'ed files are dearchived using the ZIP
              dearchiver.

     .TXT  -  ASCII text  files  that can be read on the screen
              or downloaded and processed with a word
              processor or text editor.   (unarchived).

     .WPF  -  WordPerfect files.  (unarchived)

     .TIF  -  Graphics  files for graphics compatible programs
              such as Lotus, Freelance, WordPerfect, Aldus
              Pagemaker,  etc.   (unarchived)

     .BAS  -  Basic programs.   (unarchived)

     .WK1  -  Lotus 1-2-3 worksheet files,  (unarchived)

     .DOC  -  Text file of documentation  for a program or
              system.  (unarchived)

     .FOR  -  Fortran source code, (text  format, unarchived)

     .EXE  -  A PC executable module that can be executed
              after downloading by typing the file name.
              (unarchived)  *

     .COM  -  A PC executable module that can be executed
              after downloading by typing the file name.
              (unarchived)  *

              * Note: EXE or COM may also be self-extracting
archived files
                             48

-------
4.2.   COMMAND STACKING
     Another way to  save time is to "stack" commands.  You can
stack requests  for  downloads when operating in  a download
directory.  For  example, if you want to download the ISCST Air
Quality Dispersion Model you can simply enter:

                         P 8 ISCST.ARC

     In this way you can download the file using the KERMIT
protocol  and avoid receiving  the  menu  of  protocols  and
receiving an additional prompt for File Name?.  In the above
example, note that the "D" for download is missing.  The "D"
is assumed and can be omitted.

     You can display  a text file  to your PC screen  from a
download directory by simply entering:

                         P 1 FILE.TXT

     This will avoid receiving a menu of protocols,  from which
you would select protocol number 1 that types the text file to
your screen.
4.3.   HIGH SPEED MODEMS
     The  TTN  utilizes  modems   that  range  in  speed  from
300/1200/2400/9600 baud.  If you are  currently using a 1200
baud modem but have access to a  2400  baud modem,  you should
consider using the higher speed  modem.   The higher speed is
especially valuable when downloading  lengthy  files.   If you
have a 9600 baud  modem or have plans to purchase one, be sure
that it conforms  to the V.32 standard  for  9600 baud modems.
                             49

-------
4.4.   Hot keys. Pause and Stop
     The TTN  incorporates  a "hot key"  feature,  which means
that  you can  enter  a  command  at any time  and TTN  will
immediately obey.  A menu item can be accessed by pressing the
appropriate menu key  without having to also  press "enter".
You do not have to wait for TTN  to finish displaying a menu
before you give your next command.

     Several "hot key" commands can be given at one time.  For
example, rather than  go through  multiple  layers  of menus to
reach the SCRAM BBS public message board,  simply type <3SCP>
[<3> for the SCRAM BBS,   to abort the alerts display, 
continue on to SCRAM, 

to enter the SCRAM public message area] and you will immediately find yourself in the desired area. Two other commands provide the ability to pause or abort the remainder of a display if you have set your terminal configuration to pause after each display page. This prevents nonstop scrolling. These options are in effect when you see "TYPE P to Pause, S to Stop Listing" in the upper left hand corner of your screen. The

key causes text that is being displayed on the screen to pause. The key stops the rest of the display. 50


-------
                          SECTION  5
                        GETTING HELP
     Help is available from several sources, including online,
telephone, messages and bulletins.
                             51

-------
     When you are  connected to the bulletin  board,  help is
available on command  lines that include  the  option elp.
Help with downloading  is available from the Systems Utilities
Menu along with the archivers/dearchivers that are required
for compressed files.

     During business hours  (8:00 am to  5:00  pm ET), someone
will usually be available to answer questions concerning the
operation of the board.   The voice help  line is (919) 541-
5384.  If someone is not available at the time you call, you
can leave a taped message at this number.  If you are having
trouble connecting to the board, check to see if the you are
calling with the correct parity, number of bits and terminal
emulation (see Section 2.2).  If you do not understand how to
use a command,  first try the help options.  If you are having
trouble downloading,  first consult the documentation for your
particular communications software.

     If you have a question or would like to make a suggestion
regarding the use  of  the  board, you can  leave  a message to
SYSOP  from  the  Systems  Utilities  menu  or  from  any  EMAIL
message board,  by addressing the "MESSAGE TO:"  SYSOP.

     If  you  have  non-bulletin-board  related  questions,  or
questions regarding an application within one of the Boards,
the best course of  action  is to  leave a message on the public
message board of that particular board addressed to "ALL".  In
most cases, someone will  return a message to  you or you can
browse the public board to review the questions and answers of
other users.

     If you are a new  user,  be sure to pay close attention to
the alerts for  the board you are working with, because they
contain  the  most  up-to-date  information  about  what  is
available on  the  board  and  also  point  to  bulletins  that
describe in detail  those  things that have changed or those
things that are new.

     You may obtain the most recent version of this document
by downloading the  file MANUAL.ZIP from the Systems Utilities
Menu.
                             52

-------
 APPENDIX A
BBS COMMANDS
     53

-------
54

-------
                  APPENDIX A: BBS COMMANDS


              USER PROFILE CONFIGURATION COMMANDS
     TTN permits you to easily change your user profile.  This
profile tells  TTN  how wide it should  display messages, the
type of default file transfer method  you prefer,  and other
information that will  make your use of  TTN more enjoyable.
User profiles can be changed via the Systems Utilities Menu by
pressing  the  hange  Terminal   Configuration key.    The
following commands are used to change user profile:
  A: Set ANSI codes on/off     G: Set IBM Graphics on/off
  W: Set Terminal Width        T: Set New Terminal Type
  L: Set Line Feeds on/off     C: Set Lower Case on/off
  N: Set # of Nulls            M: Set Message Entry Prompt
  U: Set File Upload Protocol  D: Set File Download Protocol
  P: Set Page Pause (-more)    S: Show Current Settings
1.  ANSI codes & IBM Graphics

     These settings  control whether  TTN sends  you special
effects.   ANSI codes  provide  highlights, color and cursor
positioning.   IBM graphics display line drawing and boxes. If
you  answer  es  to  IBM  graphics,  you  must have  your
communications program set to 8 data bits, no parity.
2.  Terminal (or Terminal Emulator) Attributes

     These  settings  define  to  TTN  how  your computer  or
terminal emulator program is  configured.  These options are:


     Terminal Width: This option tells TTN how many characters
print on a single  line on your computer so it can process text
for the  besr appearance  on  your  display.   This  number  is
usually 80.
     Line Feeds:  This option varies from computer to computer.
Try setting it to es to begin with,  as this is usually the
correct setting.   If everything appears double spaced, then
set the option  to o.  If everything  appears  on a single
line on your  screen, then you have this option  set to o
when you need it set to es.

                             55

-------
     # of Nulls;  This option determines whether  delays are
used after each line is displayed.  The normal setting is "0"
since modern  computers  don't  need  delays.    If the  first
characters of  each line are missing on your monitor, then set
the nulls equal to the number of missing characters.
     Lower Case;  If your computer cannot properly handle lower
case characters  then  set this  option to o.   Otherwise,
answer es  (default)  to get  normal Upper and  Lower case
displays.


     Page Pause (-more-1: If you set this  option to o, then
TTN will  not pause when displaying text files to your screen.
Files that are displayed will scroll continuously to the end
of the file.  If  you wish TTN to pause for you, then set this
option to  es,  and tell TTN how many lines your computer can
display on a single screen.  The number  of  lines per screen
should be  set to  24 for the best performance.  A es, allows
you to display one page at a time  and inserts a "-more-" at
the bottom of the screen at the end of each page.  Pressing a
key will  cause the next page to appear.
     Terminal Type; If  you select this option,  a series of
pre-defined computer types  are displayed.  If your computer is
shown,  then you  can  configure  all  of  the  above  options
properly for your computer by selecting that option.
3.   Protocols and Message Entry Settings
     These settings determine how the following items default
every time you logon to the system:


     File Download Protocol; If this is set to "Default", then
TTN will ask  you the first time you download a file on each
call which file transfer protocol you  wish  to  use.   It will
also always ask  in those areas where  you don't have  a set
protocol command available.  However,  if  you  set a protocol
here, then TTN will always use that protocol and will never
ask.  If you override  that protocol  in a  file area, the new
protocol will only be  used for that call and  the  next call
will revert to the protocol set here.
                             56

-------
     File Upload Protocol: If this is set to "Default", then
TTN will ask you on  every Upload command which protocol you
wish to use.  If you set a protocol here,  then TTN will always
use that protocol  and will never  ask you  what protocol you
want to use on uploads.  This protocol will also be selected
automatically if you ask to upload prepared text during
message entry.

     Message Entry Prompts: This  entry  defines how TTN will
act when you are inputting a message.  The following options
are available:
     a. Prepared Text Entry:  If this  is set to o, you will
not be asked about prepared text entry when sending an e-mail
or public message.  If you  never want to upload prepared text
into messages, then setting this option to o will save you
the time answering this question on every message.  If this is
set to es, you will be asked on each message you enter if
you want to submit prepared text-or type it in online.
     b. Prompt Type; This will configure how TTN will prompt
you during manual message text entry as follows:

     0 = Each line is prompted for with the edit line
         number only.

     1 = Each line is prompted for with the byte count
         left in the input buffer plus the edit line
         number.

     2 = Each line is prompted for with a ">" character
         only.
                             57

-------
58

-------
                 FILE DOWNLOADING COMMANDS
rea      [area #]

ownload  [filelist]

rotocol [protocol] xamine [filelist] ew elp ist [date] [help] [string] Change to specified File Area. Download a file or files. Set or change default transfer protocol. Examine and Produce a directory of an archived file. ZIP or ARC. Produce a list of files newer than a given date. View a download help listing. produce list of all files you may download or optionally only those that contain a selection string in their name or description. Press "Enter" or "Return" key alone to exit. rea This command will only appear as an option when you are working in a File Area on TTN. Examples of file areas are found in the SCRAM BBS where meteorological surface data, mixing height data and model clearinghouse data are offered. This command allows you to select which file area is currently active. If you press enter from the file area menu without making a selection, you are set to File Area #1. You may download from that area until you select another area. When you enter the "A" command by itself, a list of all available file areas is produced. You then may select the area you choose. If you already know what area you want, you may place the area number on the same line as the A command. Examples: This command will produce a list of areas. Select the one you wish, or press alone to remain in the current area. a 7 59


-------
Will select file area  7  (if one is defined).  If you select an
invalid area number, TBBS will list all the areas  and prompt
you for a valid file area selection.


This command means to press "enter" or "return" key alone to
execute or exit.
ownload

This command downloads one or more files.  You may enter the
letter "D" followed  by  one or more file names.   The "D" is
optional, and you may just enter  the file names at the select
prompt if you wish.  Example:

d filel.txt

Will download a single file.

filel.txt file2.txt file3.txt

Will download multiple files.  Wild cards may be used in file
specifications.  For example,  filel.*   or  file??.doc.  If
more than one file is selected, you must be using a protocol
capable of multi-file transfers.

Note:  TTN will halt a file transfer between files where you
would otherwise exceed byte and/or time limits.


xamine   (Archive Files Only)

This command allows  you to obtain a directory of all of the
files which are  stored  in an ARCed or  ZIPed  file.   It will
produce a directory  of  the files and their  date,  time, and
size which  are contained  in the specified  archived files,
(e.g., E FILENAME.ZIP).

e *.ZIP

will produce a directory of all ZIP files.

e filel.arc file2.arc

will produce a directory of both specified .ARC files.
                             60

-------
elp

This command will produce a  help listing on the screen that
applies to  your current  area.   If you  are in  a download
directory and press  elp you will  get help for downloading.
ist

This command will produce a  listing of files available to you
in a download section.  If there are no arguments it will list
all the files that are available.   You  may optionally put a
string after the  list command.   If  you  do, the listing will
only show those files where the name or description contains
the  specified  string.    Note:  this  string is literal,  and
doesn't honor wild card characters ? and *.

Example:

1

List all  Files in the directory

1 remm

List all  entries where the string "remm" is contained in the
file  name  or  description.  Search   strings  may  have  any
printable characters and may include imbedded spaces.
ew

This command  provides  a listing  of files posted  which are
newer than a given date.  This command has the format:

n [date]

If the  date  is omitted, the date of your previous logon to the
system is used.  Date is specified in the  same  format as  it is
shown in the directory listing.  Example:

n 08-10-83

Will list all files newer than 8-10-88.
                             61

-------

rotocol (Set or Change) This command will allow you to set a default download protocol or to change the protocol you wish to use for the remainder of this call. The first time you download a file, you will be asked for a protocol to use, and after that the same protocol will be used for each download for the remainder of this call. If you wish to avoid being asked for a protocol, or if you wish to change the protocol you have been using to a different one, then use this command. You may use the number of the protocol to select if you know it. Example: This command will produce a menu of protocols as follows: TYPE file to your screen ASCII with DC2/DC4 Capture ASCII only, no Control Codes XMODEM YMODEM/YMODEM-g YMODEM/YMODEM-g Batch SEAlink KERMIT SuperKERMIT(sliding windows) TYPE file This protocol method will cause the contents of a "text" (ASCII) file to be displayed on the screen. It is effectively a download to your screen. You can read the text file online and not have to actually download the file to your computer before you can read the document. Only those files on the TTN that have a file extension name of "TXT" or "DOC" can be displayed on the screen. Command stacking will allow you to display a text file on the screen by entering

. ASCII Protocols These protocols should be use as a last resort with non- intelligent terminals and dedicated word processors, etc. ASCII protocol transfers will only work with non-binary text files. These protocols should, for the most part never be used. There is no error checking. 62


-------
XMODEM

     This is the oldest and most widely used error resistant
protocol  in  the PC  community.   There are  two variations:
CHECKSUM and CRC.  CRC  is  more reliable at detecting errors
and  should always  be  used if  you  have a  choice.   When
downloading, TTN can automatically tell if you pick CHECKSUM
or CRC, while for uploading you  will have to tell TTN which
method to use.
YMODEM

     This protocol is essentially a CRC XMODEM with 1024 byte
(IK)  packets  and  is efficient  at  higher  modem  speeds  on
telephone lines that are relatively trouble free.  It cannot
transfer names  or  exact file size.   YMODEM-Batch should be
used if possible.
YMODEM-Batch

     This is  the  same as YMODEM except  that it allows file
name and  exact size  of the  file to  be transferred.   The
transfer  speed and   characteristics  of  this  protocol  are
identical to the YMODEM protocol.
YMODEM-g and YHODEM-Q Batch

     These variants of the YMODEM and YMODEM-Batch protocols
provide the fastest possible  speed  of file transfer if used
with high speed error correcting modems.
SEAlink

     This is a variation of XMODEM that overcomes transmission
delays caused by satellite links  or packet switched networks.
Such delays can  slow XMODEM transfer rates by as much as 700%.
KERMIT and SuperlCSHIT

     KERMIT is the only protocol that handles both 7 and 8 bit
links.  The protocols mentioned above all require a full 8 bit
link  to  operate  correctly  and are  often not  available  on
mainframes and minicomputers.  KERMIT was developed to address
this problem.   It will also adjust  automatically to complement
features available on networks and other computer systems.
                             63

-------
     SuperKERMIT adds sliding windows to eliminate link delays
and automatically  adjusts to  regular KERMIT  if it  is not
supported by both the link and calling terminal program.
ZMODEM

     ZMODEM is a fast and efficient protocol with innovative
features  such as  variable packet  sizing,  failed  transfer
restart, complete file information, 16-bit or 32 bit CRC error
checking, automatic download start-up  (receiver dictated) and
a pseudo-streaming full duplex nature.
Select the  protocol  you wish to  use (or select  the uit
option if you  don't want to  select a new  default download
protocol).

P 7

Will select SEAlink protocol as the default.
                             64

-------
                    MESSAGE ENTRY COMMANDS
     TTN supports two forms of message entry: "Line" mode and
"Off Line prepared text" mode.   "Line" mode or manual mode,
the most common type, allows you to type your message online.
You will be prompted for each line of  input.  The overflow of
one line will be wrapped around to  the next line down.  How
TTN will prompt you during your manual message text entry is
defined in your User Profile Configuration (see section 3.5
User Profile Configurations).   The  "Off Line prepared text"
mode allows you to upload a file (which you prepared off line)
as a message.

     The command options for entering private  e-mail differ
slightly  from  the   command  options   for public  messages.
Private e-mail  provides two additional options,  cpt and
ile that are not provided for public messages.
*** PRIVATE E-MAIL ENTRY COMMAND OPTIONS ***
     After entering a private e-mail message you will be given
the following options:
ist, iew,  ont,  dit, cpt,  ile,  ave,  or
uit?
     These options are explained below:
ist

     Displays your entered  text without word wrap  and with
each line numbered.  The numbers are used for editing if you
wish, or you can edit strings  as  described below.   Remember
TTN will word wrap your message when it finally displays it so
the lines may not come out exactly as you expect them.
iew

     Displays your message with word wrapping applied.  This
allows you to  see how it will  look when it is  read  by the
recipient.  Then,  if  need be, you can edit the message before
sending (saving) it.
                             65

-------
ont

     This will place you in the line mode at the end of your
message so you may continue your message.
dit

     This allows you to edit a  string of characters in your
message.   You will  be  asked for  a  line  number or/string.
There are two editing options:


1.   Enter the number of the line you  wish to change and
     that line will be displayed.   Either re-type this
     line as you want it or enter <->  followed by a 
     to delete the line.

2.   Enter a  followed by a search string (note: the
      is needed only if the string  has only numbers).
     You  will  be  prompted  for  a   replacement  string.
     Either enter  a  new  string, or   to  delete the
     string.    The  edited  string  and  15  characters
     preceding it  are displayed for your approval.  To
     quit, press  and TTN will abort the replacement
     operation.
Cpt

     If selected, you will be  asked to confirm your desire to
have a return receipt generated  when the  message is read by
your addressee.
     If you select  this  option TTN will first  ask:  "Do you
want to enclose a file in the message  (Y/N)?", If "es" TTN
will prompt: "Enter the 1-12 character file name:"

     TTN will  then ask you to upload your file as described in
section  3.5  ''File  Uploading"  with  the  exception  that  a
description of the file is not required.  After your upload is
complete, the message "*Enclosed file xxx" (where xxx is the
name you gave  the file) will appear  every time the message is
read.  The  file  may be retrieved  by anyone who  can read the
message .
                             66

-------
ave

     Your message will be saved  to  the TTN message base and
the person or persons to whom it is addressed will be notified
the next time they logon to the TTN.
uit

     You will be  prompted with: "QUIT  (Y/N)?11  If you press
, you will be  returned to  the  prompt line.   If you press
, your message will be aborted.
*** PUBLIC MESSAGE ENTRY COMMAND OPTIONS ***


     After entering  a  public message you will  be given the
following options:


ist, iew, ont, dit, ave, or uit?
     These options  are explained above  for  private e-mail.
They are identical to the options for private  e-mail, the only
difference is that the cpt and ile command options are
not available for public messages.
*** OPTIONAL ENTRY COMMANDS ***
     There is an optional command  that does not appear on a
prompt line.  This is the Carbon Copy command as explained
below:
Carbon Copy

     You may sena messages to more than one person on the TTN.
The carbon copy  command does not appear on the prompt line.
Rather, it must be typed on the first line of the message.

     The carbon copy command format  is: cc: namel,name2,....,
where  namel  and name2 are  the intended  recipients  of your
message.  Note: You must  leave  a space before the  first name.
                             67

-------
68

-------
                 MESSAGE RETRIEVAL COMMANDS
     TTN  supports  the  message retrieval  methods  that are
described below.  Remember,  you can use TTN's "hot keys" to

ause, top, go to the ext message, or use any of the other commands described below instead of waiting for an unwanted message to completely display. The command options available for retrieving messages from public messages boards differ slightly from the commands available for retrieving messages from private e-mail boards. However, some commands apply to both public and private. *** PUBLIC MESSAGE RETRIEVAL COMMAND OPTIONS *** orward If you respond with , the retrieval will begin with the first message on the board. You can give a starting message number and all messages on the board with numbers equal to or higher than the specified one will be displayed. everse This works the same as forward except the Display proceeds in reverse from the number you specify towards the first message in the system. ew messages Messages left after your last time on TTN are retrieved. arked messages Displays marked messages. Messages are marked either manually by the ''Hark" option on a scan, or automatically if you receive a "message waiting" notification at logon. Marks remain for the entire online session. ndividual message Displays a message by specification of the message number. 69


-------
elective retrieval

     Messages  are  selected  by   fields:  rom,  o,  or
ubject and text string.  After you pick  one,  you will be
asked  for  a text  string to  match.    This  string may  be a
partial  one  and   .iy  message which  contains  the specified
string will be di£ Clayed.

     Example: If you specify  ubject and  a text string of
IBM_, then the following subject fields would all match:

               IBM PC USER'S GROUP
               ALL IBM PC OWNERS
               IBM/AT OWNERS

     The string will be searched for anywhere in the specified
field.  After the string is specified, you will be asked for
a starting message number so you can restrict the search time
if you wish.
*** PRIVATE E-MAIL MESSAGE RETRIEVAL COMMAND OPTIONS ***


wd

     If you  select this  option,  you will  be asked  who to
forward the  message  to and you will be asked to  enter the
board on which  you wish to place the message.   For private
EMAIL, select the message board named "MAILBOX".


elete

     If a message is  either from you  or to you, you can press
 to delete it.


ncl

     This prompt indicates that a displayed message  has a file
enclosed in ic v ths file name also is  displayed),  Press  to
enter a download sequence identical to normal file download as
described in section 3.2 to receive the enclosed file.
                             70

-------
*** PUBLIC AND PRIVATE E-MAIL RETRIEVAL COMMAND OPTIONS ***
arked messages

     Displays  marked  messages.   Messages  are marked either
manually by the "Mark" option on a scan, or automatically if
you receive a "message waiting"  notification at logon.  Marks
remain for the entire online session.
Pause between messages

     On all retrievals except individual, you will be asked:
"Pause After  Each Msg(Y/N)?".   If you  enter , then this
prompt always follows a displayed message:

                    gain, eply, ext, or  top?
gain

     Pressing A will cause the message to be displayed again.


eply

     Pressing R will allow you to enter a Reply to the message
you have just seen displayed.  This reply will be chained to
the message for future retrieves.


ext

     Pressing either N or  will display the next message
in the retrieve.


top

     Pressing s will stop(abort) the retrieve.


Reply Chain Reading

     If a message  is  part of a subject chain, then one or both
of these prompts may be displayed: "<*>replies and <->".  If
you press  *,  you  will get  the next message  forward  in the
reply chain.   If you  press -, you get the preceding message in
the chain.  The ext prompt now changes to indicate the next
message forward in the chain.   At the  end of the chain in the
forward  direction,  you will  receive  the  message: "End  of

                             71

-------
replies, add yours (Y/N)?.   es allows you to add a message
to the chain.  o drops you out of the chain and back into
the regular message base.   Note: The  <*>  command is a short
cut.  If you overlook the <*> option  and press  ext, you
will be prompted with: "Message has replies, read now(Y/N)?.
Selecting es is the same  as  if  you had initially pressed
<*>.  If you enter o,  then the next sequential message is
retrieved.
No Pause Between Messages

     If you  answer  N  to the  pause  question,  you  will  be
prompted for a reply  if an unread message is  addressed to you.
Also, if a message  is either from or to you,  you may delete it
at any  time  and help conserve disk space.   When you select
o to the pause question you will further be asked:

               For reply chains:
                Ask on each
               <2> Always follow
               <3> Never follow
                Help

     If you select  1, then every time a message is encountered
which is part of a chain, you will be asked:

               Message has replies, read now(Y/N)?

     Answering  Y,  will read all  related messages  in order
before proceeding with the next message.  Answering  will
read messages in strict numeric order.

     If you select  2, the messages will always be retrieved by
subject group.

     If you select  3, the messages will always be retrieved in
strict numeric order.

     Note: Even in the No Pause mode,  you may  still use the
ext message or top message hot keys I
                             72

-------
                 ONLINE CONFERENCE COMMANDS


Brief Command Descriptions

Note: The characters in brackets are optional.

     Command                         Description
1)   /w[ho]                 Lists who else is on
2)   /s[end],n message      Sends message to any active line
3)   /i[gnore][,n] on       Do not receive messages from
                            other lines
4)   /i[gnore][,n] off      Receive messages from other
                            lines
5)   /p[rivate],n           Set up private conference with
                            another line
6)   /channel n             Go to a CB simulator channel
7)   /q[uit]                Exit conference area, return to
                            conference menu
Detailed Command Descriptions
W[ho]  .

This  command  will  list all  other lines  which are  in the
conference you are now a part of.  If you are not currently in
any conference, then  this  command will list all other lines
logged on at this time, no matter what they are doing.
/s[end],n message

The characters in brackets []  are optional and do not need to
be entered.  This sends  the  text of  the message to  line n
prefaced by your line number and name.  If that line is in a
download or upload, then  you  will get a message saying "try
again later".   You will also get this message if that line has
an ignore flag set for your line.


/i[gnore][,n] ON   or
/i[gnore][,n] OFF

This command sets the  ignore flag ON or OFF for the specified
line.  If no line is specified then all ignore flags are set
either  on  or  off.    If  an   ignore  flag is set  ON  for  a
particular line, then nothing that  line  sends  to you either
via a SEND command,  or as part of a conference will be
received by you.

                             73

-------
/P[rivate],n

This command allows you to set  up  a private conference with
line n.  That line must also enter a corresponding private,n
command where n is your line.   At  that  time,  you and line n
are in a totally private one on one conference.
/Channel n

This  command allows  you  to  go to  channel  n  of  the  CB
simulator.  Note:  n must be in the range 1 to  40.   You may use
this command to  change channels as often  as you like.  If you
were in a  private conference when you issued this command, you
will exit that private conference automatically.
/Q[uit]

This command will exit you  from any Private or CB conference,
and return you to the public conference.  If you are already
in the public conference  then this command will return you to
the online conference main menu.
                             74

-------
              APPENDIX B






ACCESS THRU ETHERNET AND PORT SELECTORS
                  75

-------
76

-------
APPENDIX B: ACCESS THRU ETHERNET AND PORT SELECTORS
     The TTN is available as a node on the NCC ETHERNET LAN.
This service is available from various  locations  in the local
Triangle area  such  as ERG, CATAWBA, and MUTUAL.   Wiring is
provided in these buildings  that allows connectivity to the
ETHERNET ring.  Communications software is required in order
to use the service.   The following instructions are provided
for ETHERNET  access using CROSSTALK,  the EPA  standard for
communications software.
     IET LAN access using

     Access to  TTN on  ETHERNET is accomplished  thru XTALK
using a special ETHERNET command file.  This command file is
available from  the TTN Central SYSOP  if it is not in your
XTALK directory.

     There are  some  key parameters in  the  ETHERNET command
file to check and/or set accordingly:

      SPeed 9600   PArity None   DUplex Full   DAta 8

          STop l   EMulate VT-100   INfilter Off

The ETHERNET command  file  is activated by entering the number
corresponding to your ETHERNET file.  The system will print:
"Local  link  now active"  momentarily  at  the bottom  of  the
screen.
                    <== Hit enter, "Local>" prompt
                               appears
Local> SET BREAK LOCAL     <== Sets break key for terminal
                               session
Local> C SCRAM             <== Command to connect to TTN
                    <== Hit enter key, TTN comes up
For downloading, the server must be set for binary transfer.
This must be done after the TTN session has been established.
It cannot be done prior to the TTN connection.  The following
sequence will provide downloading capability:
                             77

-------
Note: The following 4 entries can be omitted if KERMIT is used
as the download protocol.

                      <== Hit end, the XTALK break key
                    <== Hit enter, "Local>" prompt
                               appears
Local> SET SESSION PASSALL <== Sets server port for binary
                               transfer
Local> RESUME             <== Goes back to Host (TTN) prompt


After leaving TTN using the oodbye command:

                      <== Hit end, the XTALK break key
                    <== Hit enter, "Local>" prompt
                               appears

Local> LO                  <== Logout Ethernet session
Local> USER NAME           <== Enter your user name or
                               initials

Exit from XTALK:

                     <== Switch to XTALK command mode
                     <== Exit XTALK
Note: The following prompt may or may not appear:

      Enter username> XXX        <== Enter a character or
                                     initials
                             78

-------
ETHERNET LAN access usinct
     There are some key parameters in PROCOMM to check and/or
set accordingly:

        Speed 9600   Parity None   Duplex Full   Data 8

        Stop 1   Emulate VT-102   Translate Table  Off

Access PROCOMM  through  AUTOMAX  or directly from the PROCOMM
directory using DOS:

                    <== Hit enter, "Local>" prompt
                               appears
Local> SET BREAK LOCAL     <== Sets break key for terminal
                               session
Local> C SCRAM             <== Command to connect to SCRAM
                    <== Hit enter key, TTN comes up

For downloading, the server must be set for binary transfer.
This must be done after the TTN  session has been established.
It cannot be done prior to the TTN connection.  The following
sequence will provide downloading capability:

Note: The following 3 entries can be omitted if KERMIT is used
as the download protocol.

                  <== Press ALT, B the PROCOMM break
                               key and the "Local>" prompt
                               appears
Local> SET SESSION PASSALL <== Sets server port for binary
                               transfer
Local> RESUME             <== Goes back to HOST (TTN) prompt

After leaving TTN using the oodbye command:

                  <== Press ALT, B the PROCOMM bifeak
                               key and the "Local>" prompt
                               appears
Local> LO                  <== Logout Ethernet session
Local> USSR NAME           <== Enter your user name or
                               initials

Exit from PROCOMM:

                   <== Press ALT, X and enter Y

Note: The following prompt may or may not appear:

      Enter username> XXX        <== Enter a character or
                                     initials

                             79

-------
Access through NCC Port Selector
Access to TTN is available  from the NCC port selector through
a telephone  line  or  from a LAN.   NOTE:  This  service is not
available through a dedicated IBM 3270 terminal line.  Consult
with  your  computer  personnel  or  LAN  administrator  for
instructions on gaining access to the port selector from your
particular location.   This connection  requires a 7 bit link
and your communications software must be set accordingly:

                      Parity = E
                   Data Bits = 7
                   Stop Bits = 1                         i

KERMIT is the only Protocol that can be used for downloading
using this access  method,  since KERMIT is  the only Protocol
that handles both 7 and 8 bit links.

The port selector will have the following appearance:
Welcome  to  the  Environmental  Protection  Agency  National
Computer Center

      Please enter one of the following selections:

                  IBMPSI for IBM
                  TCP for IBM 3270 EMULATION
                  VAXA for VAX SYS A
                  VAXB for VAX SYS B
                  EMAIL for EMAIL

  Enter selection:

At the enter selection prompt enter "ENET"

The following  messages  and prompts will  appearxwith slight
variations:

Connected.

DECserver 200 Terminal Server V3.0 (BL33F) - LAT V5.1

Please type help if you need assistance

Enter username>

At the Enter username prompt enter your "name or initials"

You should now see the following prompt:
                             80

-------
Local>

Respond to the Local prompts as follows:

Local> SET BREAK LOCAL
Local> C SCRAM

You should now be in a TTN session.  If your TTN configuration
is set with IBM graphics capability turned on, the lines that
normally surround the menus will appear as letters.  You can
improve the appearance  of  the  menus by  going to the Systems
Utilities Menu and  under hange  terminal configuration, set
IBM Graphics  to "no".   The menu  lines will now  appear as
dashes.

After entering oodbye from the  TTN, you must now enter the
appropriate break key for your communications software.  The
following  are break  key  sequences for  XTALK  and  PROCOMM
(PCPLUS):

                 XTALK  -   
                PCPLUS  -   B
               PROCOMM  -   F7
                             81

-------
82

-------
           APPENDIX C
GLOSSARY OF COMMUNICATIONS TERMS
               83

-------
84

-------
          APPENDIX C: GLOSSARY OF COMMUNICATIONS TERMS
ANSI

American National  Standards  Institute.    ANSI refers  to a
standard set of  escape sequences  for  controlling special
features on a video terminal.  In the MS-DOS operating system,
the driver  is called  "ANSI.SYS" and is usually installed by
the computer user.  Most EPA IBM microcomputers have ANSI.SYS
already  installed.    Such  features  as  cursor positioning,
color, bold and blinking lights are provided by ANSI escape
sequences.
American  Standard  Code  for  Information  Interchange.    A
standard character set and coding scheme to represent numbers,
symbols, alpha  characters and  other  control codes.   ASCII
codes  32-127 constitute  the  96  printable  characters  (52
upper/lower  case   letters,   "space",   10   numbers  and  33
punctuation marks and symbols.  Microcomputers commonly use an
8-bit format that provides  up to  256  combinations known as
extended characters.   ASCII  is  often used  as  an adjective
describing computer files that only contain the 96 printable
characters.
Asynchronous Communications

A way of transmitting data  in  which start and stop bits are
used to frame each character.   Data is sent and received at
irregular intervals of time.
Baud

A measure of transmission rate in bits per second (bps).  Baud
is  interchangeable  with  BPS  by  common  usage,  although
technically incorrect.
BBS

Electronic bulletin board system.


Bit

The smallest unit  of  information.   A bit can  have only two
states,  "on" and "off".  A binary digit.

                             85

-------
Block

A standard unit of information sent by one computer before it
pauses to learn if the  other computer has received it without
error.  The common block size for microcomputer communications
protocols is 128 bytes.
Byte

A binary character,  commonly eight bits.  A byte can have 256
possible  combinations.    Every  ASCII  character  or  code  is
uniquely  defined  by a  particular byte.   Bytes  are  also  a
measure of a computer's  memory, usually expressed in terms of
"kilobytes", or Kb.   There  are  1,024 bytes in  a  kilobyte.
Conventional memory in  a  microcomputer is  640Kb.   Eight-bit
bytes in PCs are truncated to seven bits during transmission
to other  computers  if a seven-bit data transfer  protocol is
used.
Download/Upload

Retrieving a  file  from a BBS  and  sending a file  to  a BBS.
Most users will be  retrieving  (downloading).files more than
sending (uploading) files.
Duplex

In  communications,  duplex  is  often  used  to  control,  or
indicate, who has control  of the responsibility to echo text.
When operating at full duplex, characters you type are sent to
the remote,  who then echoes them back to you, where they are
displayed.   When  using  half duplex,  on  the  other  hand,
characters you type  are echoed locally by the software you are
using and characters sent to  the  remote are not echoed.   If
you see double characters  on your  screen, then you should set
duplex to full;  if there should be  characters printing on your
screen but there are not,  then set duplex to half.
Local Area Network (LAN!

A system by which many microcomputers and peripherals may be
linked together,  accessing common files from a single computer
called a "file server".   The  file server is usually a PC with
a large fixed disk.  The file server may contain data bases,
software and files that can be shared simultaneously.
                             86

-------
Logon/Logof f

Establishing  and breaking  a  communications  link.    When a
telephone  link is made,  the BBS  will  identify  itself  and
prompt the caller to "logon".  The callers name,  location,  and
password constitute a unique identifier.
Modem

MOdulator/DEModulator. The modem converts binary electrical
signals  (positive  and negative  charges)  to voice frequency
(analog)  signals.   Binary impulses  are a  series  of on/off
switches  or  clicks,  while voice  frequency  signals are more
like waves, up and down, increasing and decreasing pitch.  The
modem  "modulates"   the signals  put  out  by  the  computer,
converting them  from digital  to analog form,  then,  at the
other end, "demodulates" the analog signals, converting them
back to digital form.
Parity

Because there can be garbled data, particularly on telephone
lines where the loss of a single bit is almost to be expected,
there must be some way to  flag possible errors so the sending
computer can know that the data were not correctly received.
Parity is a  relatively rough way of checking to assure that
each  byte  is  properly  transmitted.   The normal  ASCII set
(first 128  characters) can be represented with just seven bits
for each character.  The eighth  bit can be  ignored or used as
a "parity bit".   The  parity bit is used to indicate whether
there  is an even  or an  odd  number  of  1's  in the  byte
transmitted.   In most early personal  computers,  only  seven
bits were used and the eighth bit was  either  ignored or used
for parity.   Now, however,  with DOS  and  the extended ASCII
character  set,  all  8  bits are used  to  represent  the 256
extended ASCII  characters  and  no parity is  used.   With the
eighth data  bit  being used  to  store data,   other  means of
checking transmission integrity  is used such as error-checking
protocols.
Protocols

Standardized  send/receive commands  that are  part  of  most
microcomputer communications software.  Both the sending and
receiving computer must run the same  protocol.  Protocols use
methods that  are  far  more complex than simple parity checks
for error correction  and  the  reliability is far greater, so

                             87

-------
they are especially useful for transmission of programs rather
than mere  text.   The software sends  a block of  data  and a
coded query.  The receiving software notes the query and sends
back a bit pattern depicting  the data block received.  If the
sending computer recognizes the response as identical to the
coded query, it proceeds to  the next block.   If there is an
error, the system resends  the same block.  The most common
protocols are XMODEM, YMODEM, KERMIT,  and ZMODEM.
                             88

-------
        APPENDIX  D
BULLETIN BOARD DESCRIPTIONS
            89

-------
90

-------
        AIR POLLUTION TRAINING INSTITUTE rAPTIl BBS
The Air Pollution Training Institute (APTI) offers the widest
scope of air pollution training in the United States.  Funded
by the  U.S.  Environmental Protection Agency,  APTI develops
instructional material for and provides technical assistance
to training activities conducted  in support  of the nation's
regulatory programs of air pollution abatement.

EPA-sponsored  lecture and  laboratory  courses,  using  APTI
materials,  are scheduled  at  several  locations across  the
country. Self instructional courses, providing opportunities
for individual training at home or in place of employment, are
obtainable from APTI.  Training material is continually
updated,  and  individual  courses  undergo  periodic  major
revision.

APTI publishes  a  "Chronological  Schedule of  Air  Pollution
Training Courses";  generally once  a year. This publication
describes the training being offered with a description of the
APTI courses and how to obtain the training.

If you  would  like a copy of  "Chronological  Schedule  of  Air
Pollution Training  Courses"  contact the  Registrar  at (919)
541-2497.
                             91

-------
                  AIR ACT
     The Clean Air Act Amendments Bulletin Board System (CAAA
BBS) is designed to provide access to information on the Clean
Air  Act  amendments  of  1990.    Through  this  electronic
information  dissemination  vehicle,  the  CAAA  BBS  allows
regulators, the regulated community and members of the general
public to  easily  obtain access to that  information  that is
relevant to the 1990 Clean Air Act amendments (CAAA).  In this
manner, the task of understanding, implementing and complying
with the requirements of the new law will be made easier.

     In  addition   to  providing  easy  access  to  important
information on  the CAAA, the CAAA BBS  serves as  a forum for
technical interchange at the working level  among  EPA,  State
and local agencies and the private sector.  The communications
section of  the main menu allows  users to  send and  receive
information from other users of the bulletin board.

     The information that can  be  retrieved  through the CAAA
BBS is organized according to the following  fifteen sections:

       *  Purpose of the CAAA Bulletin Board
       *  Index
       *  General
       *  Clean Air Update
       *  Title I
       *  Title II
       *  Title III
       *  Title IV
       *  Title V
       *  Title VI
       *  Title VII
       *  Title VIII
       *  Title IX
       *  Title X
       *  Title XI

Although the subject of each of  these sections is generally
self-evident,  the  type  of  specific  information that  can be
located  in  each  section may  not  be.   Consequently,  the
information thar rr.ay be located in each of these sections is
described below.  Because of the  similarity of the sections
dealing  with  the  various  Titles of  the  CAAA,  these  are
discussed together.

Purpose of the  CAAA Bulletin Board - This  section explains the
purpose of the  bulletin board.
                             92

-------
Index - This section contains an index to the bulletin board.
This index is useful to users of the bulletin board who may be
interested  in  a specific topic,  but may not  be sure where
information is located on the bulletin board.

General - This  section contains information relating to the
CAAA and which are not specific to any one Title  of the CAAA.
For example, definitions  of  terms, a listing of acronyms, and
summaries  of  specific  topics  (e.g.,  dispersion modeling,
ambient monitoring, certain source categories, etc.).

Clean Air Update  -  This  section contains  the full text of a
publication entitled  "CLEAN  AIR UPDATE"  issued on a monthly
basis by EPA.   The  publication contains  listings of: 1) the
times and locations of upcoming public meetings on Clean Air
Act  programs,  2) upcoming  regulatory actions,  including a
contact person,  3)  reports  that have been recently released
that relate to the implementation of the Clean Air Act, and 4)
major Federal  Register notices  that were  published  in the
month preceding the publication of the Clean Air Update.

Titles I - IX - These sections contain information specific to
a Title of the CAAA.  If  a user of  the bulletin board selects
a particular Title, a listing of three submenu items will be
seen on the screen.   These submenu items are the  same for all
Titles and include the following:  (1) Clean Air Act text and
summaries,  (2) Policy/Guidance  documents,  and (3) Status of
rules and other projects.  The information that is contained
within each of these subsections is described below.

(1)  Clean   Air  Act  text and  summaries  - This  subsection
contains actual text of each Title of the CAAA.  The text is
presented in a variety of formats to allow the user to select
the form that  best  fits  their specific  needs.   For example,
summaries of each Title are  included for those users that are
only interested  in  a cursory review of a  particular Title.
This subsection also contains information that allows the user
to better understand the contents of the CAAA.  For example,
table of contents and summaries  of  regulatory requirements
that are contained within each Title are included.

(2) Policy/Guidance  documents - This subsection contains those
policy ana guideline documents that have been developed by EPA
as a result  of the CAAA.  This subsection will assist bulletin
board users  in  identifying and obtaining copies of the various
documents that have been developed by EPA in assisting State
and local air pollution control agencies in understanding and
complying with the programs  established by the CAAA.
                             93

-------
(3) Status  of rules  and other  projects  -  This  subsection
contains information relating to those regulatory development
projects and other projects  that  are  being implemented as a
direct result of the  CAAA and allows the  user  to obtain an
understanding of  the status,  scope  and  timing  of  Federal
implementation activities.  Parties interested in a specific
rulemaking activity will be able to find information on that
rulemaking activity within this subsection.
                             94

-------
              CONTROL TECHNOLOGY CENTER (CTC) BBS
The CTC is a cooperative effort for engineering assistance to
State and local air  pollution control agencies (and private
companies to an extent) by  the Air and Engineering Research
Laboratory  and  the   Office of  Air  Quality  Planning  and
Standards.   It is a  cooperative  effort with  the  State and
Territorial Air Pollution Program Administration (STAPPA) and
the  Association of  Local   Air  Pollution  Control  Officials
(ALAPCO).

The CTC provides three levels of assistance:

           *  HOTLINE - (919) 541-0800
                        (FTS) 629-0800
           *  Engineering Assistance
           *  Technical Guidance

The CTC's goal  is to  provide technical  support to State and
local agencies and EPA's Regional Offices in implementing air
pollution control programs.  The  CTC  assists regulatory and
permitting agencies,  but does not provide policy guidance and
compliance  advice  which is the  responsibility  of  the  EPA
Regional Office.  CTC services  are available  at  no cost to
State  and  local  air  pollution  control  agencies   and  EPA
Regional  Offices.    Other  government agencies may  use  the
HOTLINE for technical assistance or to order CTC documents.
                             95

-------
CLEARINGHOUSE FOR INVENTORIES AND EMISSION FACTORS  (CHIEF) BBS
The  CHIEF  BBS   provides  access  to   tools  for  estimating
emissions  of  air  pollutants  and  performing air  emission
inventories.    Some of  the tools provided  by CHIEF  are as
follows:

SPECIATE - Speciation factors are used to estimate emissions
of air  toxics from emission  factors or estimates  of total
volatile organic compounds (VOCs)  or particulate matter (PM).

XATEF - A data base management system that contains crosswalk
data and air toxic emission factors.

SIMS -  The Surface Impoundment Modeling System  (SIMS)  is a
personal  computer  software  package   for   estimating  air
emissions from surface impoundments or wastewater collection
devices.

AFSEF  - AIRS/Facility  Subsystem  Emission  Factors  (AFSEF)
allows the user to access the AIRS/AFS Source Classification
Codes and Emission Factor listing  on PC diskette for use with
the Aerometric  Information Retrieval System (AIRS)  Facility
Subsystem, the computer data base for criteria pollutant point
source data.

CHIEF serves as  EPA's central clearinghouse  for the latest
information  on  air  emission  inventories  and    emission
factors.    Emission  estimation  data  bases,  newsletters,
announcements,  and  guidance on  performing inventories  are
included in CHIEF.
                             96

-------
EMISSION MEASUREMENT TECHNICAL INFORMATION CENTER  fEMTIC) BBS
The EMTIC BBS provides technical guidance on stationary source
emission testing issues, particularly  to people who conduct
and/or oversee emissions tests in support of the development
and implementation of  emission standards,  emission factors,
and State implementation plans.

The Emission Measurement Technical Information Center BBS was
formed to function as a major component of EMTIC's technical
information exchange  network focusing on emission test methods
with the purpose  of  promoting consistent  and  accurate test
method application in development and enforcement of national,
state, and local emission prevention and control programs.

EMTIC offers  computer  programs, stack testing  information,
test methods,  regulations, EMTIC documents,  the latest changes
to methods, bulletins,  news,  contact names and phone numbers
within EMTIC  that  have  particular  responsibilities,  public
domain software and E-MAIL service.
                             97

-------
  OFFICE OF AIR QUALITY PLANNING AND STANDARDS fOAQPS1 BBS
The Office of Air Quality  Planning  and Standards (OAQPS) is
responsible  for  the  development   of  national  programs,
technical policies,  regulations, guidelines and criteria for
air  pollution  control.    The  OAQPS  Bulletin  Board  is  an
information board that provides the organizational structure
of OAQPS along with the organizational structure of the four
Divisions within  OAQPS.    Information relative  to services
rendered by OAQPS is also available from this BBS,
                             98

-------
   SUPPORT CENTER FOR REGULATORY AIR MODELS f SCRAM) BBS
The  SCRAM  BBS  is  the  Agency's   primary  source  for  the
acquisition  of the  computer  code for  the regulatory  air
models.     Changes  to   the  models,   including  updates,
corrections, and new  regulatory codes are main features of the
SCRAM.   We encourage  FREQUENT ACCESS to  determine "what's
new?".   Significant  announcements  and new  information will
always be indicated in the SCRAM ALERTS section of the BBS.

In  addition  to  code,  model  related  news  and  important
bulletins concerning model modifications,  status,  etc.  are
provided.   An  especially  important  feature  is  the  "Model
Change Bulletin" (MCB) provided for each model/program.  MCB#l
lists information  on the  initial status of that  model;  new
MCB's are posted for each  model  as required when  models are
updated.  A model  status report is  provided that lists all of
the  models  available  along with   the  latest  model  change
bulletin and indicates if  documentation  is  available  on the
SCRAM BBS.
Other features provided by the SCRAM BBS include:

     *  Surface meteorological data

     *  Mixing height meteorological data

     *  Model clearinghouse memos and information

     *  Subject conferences concerning modeling issues
                             99

-------

-------
TECHNICAL REPORT DATA
(Please read Instructions on the reverse before completing)
1. REPORT NO. ' 2.
EPA-450/4-91-020
4. TITLE AND SUBTITLE .
Office of Air Quality Planning and Standards
(OAQPS) Technology Transfer Network (TTN)
User's Manual
7. AUTHOR(S)
Herschel W. Rorex
9. PERFORMING ORGANIZATION NAME AND ADDRESS
Source Receptor Analysis Branch
Technical Support Division
U. S. Environmental Protection Agency
Research Triangle Park, N.C. 27711
12. SPONSORING AGENCY NAME AND ADDRESS
3. RECIPIENT'S ACCESSION NO.
5. REPORT DATE. ,-..-.,
August 1991
6. PERFORMING ORGANIZATION CODE
8. PERFORMING ORGANIZATION REPORT NO.
10. PROGRAM ELEMENT NO.
11. CONTRACT/GRANT NO.
13. TYPE OF REPORT AND PERIOD COVERED
14. SPONSORING AGENCY CODE
EPA-450/4-91-20
15. SUPPLEMENTARY NOTES
EPA Project Manager: Jerome B. Mersch
16. ABSTRACT
  The office of Air Quality Planning and Standards (OAQPS) Technology
  Transfer Network  (TTN)  is a network of electronic bulletin boards
  that provide  information and technology exchange  in areas related
  to air pollution  control such as, air quality  modeling, emissions
  testing   control technology,  emissions  inventories  and factors,
  training and  the  Clean  Air Act Amendments.   This  manual describes
  the functions of the system and provides instructions for operating
  the system.
                             WORDS AND DOCUMENT ANALYSIS
  Air quality  modeling
  Emissions  inventories
  Clean  Air  Act Amendments
  Air pollution training
  Emissions  measurements
                                      b.lOENTIFIERS/O°EN ENDED TERM:
 User's Manual
 Technology  transfer
                      c. COSATI I icki 'Group
  DISTRIBUTION S T A "

   unlimited
'unsciuasTsicf il
i 21 \O. OF
                                      20 SfcCuRITY .Ci.-j53 LT'us
                                      unclassified
                                                            !22 PRICE
EPA Form 2220-1 (Re* j-77

-------
U.S..  Envlronr. ?:it -."'.
Region 5, Lro .-;.'-'•/ •
230  S.  Dearborn :-•<•-.•:•,,  Eoou
flhioafo, IL    60604

-------