modems@telebit.UUCP (Modem Mail Account) (04/28/88)
Recently I've noticed a slight bug in the SCO dialer that is provided for
the Telebit TrailBlazer from the SCO Customer Support Department. This
disk contains several programs, including "cu", "uucico" and "dialTBIT"
which is a dial program to specifically work with the Telebit TrailBlazer.
If you have XENIX, and want to use the TrailBlazer or TrailBlazer Plus
modem, call SCO and ask for the "Telebit Update Disk" and they'll
send it out to you.
NOW, the fix. If you are using a TrailBlazer (NOT a TrailBlazer Plus), the
dialer may not work properly without a slight change. The dial program
tries to set S110=0 when it calls MDDIALOUT (see line 229 in dialTBIT.c
on the provided source code). This will result in an ERROR message from
the modem, since the TrailBlazer doesn't provide the option to run data
compression (this is a non-issue in the 'Plus, since compression is
standard).
Change the entry in line 229 of your source code from:
#define MDDIALOUT "ATS66=1S110=0\r"
to the new entry for the TrailBlazer:
#define MDDIALOUT "ATS66=1S110=255\r"
If you'd like, make two versions of the dialer, one for TrailBlazers (with the
above fix), and one for the TrailBlazer Plus (fix not needed).
Note that the fix will work with both modems, but MAY allow compression if
the modem at the other end has it enabled (with S110=1).
Hope this clears things up!
Regards,
================================================================================
Richard Siegel Phone: (415) 969-3800
Senior Systems Engineer UUCP: {uunet,ames,hoptoad}!telebit!rls
Telebit Corporation ARPA: telebit!rls@ames.ARPA
"When the going gets tough, the weird turn pro"...HST
================================================================================