Path: utzoo!mnetor!uunet!pyrdc!grebyn!karl
From: karl@grebyn.COM (Karl A. Nyberg)
Newsgroups: comp.dcom.modems
Subject: Two Telebit Trailblazer+ Troubles
Message-ID: <10725@grebyn.COM>
Date: 7 Apr 88 13:49:59 GMT
Organization: Grebyn Corp. HQ
Lines: 38

System: microvax II, Ultrix 2.2.  Telebit Trailblazer + with 4.0 firmware
Modems are on separate terminal and phone lines.  /etc/acucap has been moved
to /etc/acucap.orig, so the compiled in code in uucico for hayes is being
used (that was the easiest way to get the USR 2400s working originally).

Problem 1: modem will receive connections at 1200/2400 (and 9600 from
regular connections, but I don't think it's making 9600 uucp connections),
and begin transfer but sometime thereafter will abort with a BAD READ as
shown below.  Occassionally complete transmissions WILL be made.

       root vrdxhq (4/7-0:08-1001) BAD READ1 (expected 'S' got FAIL)
       news umd5 (4/7-2:39-4158) BAD READ1 (expected ')
       root pyrdc (4/7-4:20-4550) BAD READ1 (expected ')
       root pyrdc (4/7-9:21-7815) CAUGHT (SIGNAL 1)
       root pyrdc (4/7-9:21-7815) Bad file number (PKXSTART write failed)

Problem 2: With switch setting S50=255 (stored with &W) modem will make 9600
baud connections, but not other speeds.  With switch setting S50=3, modem
will make 1200 and 2400, but not 9600.  L-devices says:

       ACU ttyd3 ttyd3 9600 hayes "" A\dA\dA\dT OK ATS50=255X0S110=1X0S111=30X0
       ACU ttyd3 ttyd3 2400 hayes "" A\dA\dA\dT OK ATS50=3X0S110=S111=30X0
       ACU ttyd3 ttyd3 1200 hayes "" A\dA\dA\dT OK ATS50=2X0S110=S111=30X0

When running in debug mode (to the 9600 link), the modem is sent the string
ATH and ATZ just before the dial sequence.  I suspect that this has the
adverse effect of resetting the modem back to the stored defaults, which
means the slower speed.  Is there something wrong with my L-devices file?  I
have no modem commands in my L.sys file. Is my only solution to write an
acucap definition for the trailblazer?  If so, has anybody already written
one?  Thanks.

-- Karl --
-- 
Karl A. Nyberg          karl@grebyn.com, nyberg@ajpo.sei.cmu.edu
Grebyn Corporation                  karl%grebyn.com@umd5.umd.edu     
P. O. Box 1144                         {decuac,umd5}!grebyn!karl
Vienna, VA 22180-1144                               703-281-2194