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DDN MGT Bulletin 95              DISA DDN Defense Communications System
7 APRIL 1992                      Published by: DDN Network Info Center
                                     ([email protected])  (800) 365-3642


                       DEFENSE  DATA  NETWORK
                        MANAGEMENT  BULLETIN

 The DDN MANAGEMENT BULLETIN is distributed online by the DDN Network
 Information Center under DISA contract as a means of communicating
 official policy, procedures and other information of concern to
 management personnel at DDN facilities.  Back issues may be read
 through the TACNEWS server ("@n" command at the TAC) or may be
 obtained by FTP (or Kermit) from the NIC.DDN.MIL host [192.112.36.5]
 using login="anonymous" and password="guest".  The pathname
 for bulletins is ddn-news/ddn-mgt-bulletin-nn.txt (where "nn" is the
 bulletin number).
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                       CODEX Modem Procedures

1.  The CODEX modem used as the replacement for the AT&T dial-in modem does
    not work the same way as the AT&T modems did.  The AT&T modem and TAC
    combination required that the user send a control Q to determine the
    connection speed.  The TAC would then display the banner and be in the
    ready state to respond to TAC commands.  The CODEX modem and TAC
    combination does not require the control-Q and, under some circumstances,
    may not respond to a single control-Q.

2.  If you experience problems, the following process appears to consistently
    correct the problem.

         (NOTE: Script files MUST NOT contain TAC or account passwords
         --that is a violation of MILNET access procedures!)

    Using a script file that currently works with the AT&T modems, add a 5-
    second pause before issuing the control-Q character.  This should allow
    users to connect without any further action or deviation from former
    procedures.

3.  This is a "quick fix" solution and may have significant impact on
    current users who do not know how to maintain their own script files.
    However, at this point, it is the only solution DISA has in hand.
    A request will be made to DISA Engineering support to determine if a
    better and more universal solution exists.

4.  Any MILNET user having difficulty connecting to a MILNET TAC should
    contact the NIC Help Desk for assistance.  The Help Desk telephone # is
    1-800-365-3642 (1-800-365-DNIC).




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