Path: utzoo!attcan!uunet!seismo!esosun!ucsdhub!hp-sdd!sceard!mrm
From: mrm@sceard.UUCP (M.R.Murphy)
Newsgroups: comp.dcom.modems
Subject: Re: Low speed and Telebit modems
Keywords: Telebit 2400bps 1200bps
Message-ID: <855@sceard.UUCP>
Date: 11 Nov 88 03:01:50 GMT
References: <7307@daver.UUCP> <1205@vsi1.UUCP>
Reply-To: mrm@sceard.UUCP (0040-M.R.Murphy)
Distribution: na
Organization: Sceard Systems, Inc., San Marcos, CA  92069
Lines: 37

In article <1205@vsi1.UUCP> lmb@vsi1.UUCP (Larry Blair) writes:
|In article <7307@daver.UUCP> dlr@daver.UUCP (Dave Rand) writes:
|>Has anyone (else) had problems with connections to Telebits,
|>when calling at low speed? I have heard reports of problems
|>at 1200 bps, when calling into a Telebit. Recently, I have
|>had a great deal of problems with another site calling into
|>my Telebits at 2400 bps - no files longer than a few K would
|>transfer.
|
|I wonder...  I was going to post on a similar problem.  Maybe they're
|related.
|
|I talk to a site that has severe input speed problems.  They are unable
|to receive and process uucp packets faster than about 150 cps during the
|day.  The TB buffers about 10K of packets, so the time between when my
|system sends the last packet of a news batch and when the "CY" aknowledging
|complete reception is consistently over 70 seconds; greater than the
|timeout in my uucp.  The problem didn't occur with the X. files or with
|short mail messages, since the buffer never filled.
|
|The solution I implemented was to increase the timeout value to about
|120 seconds.  A better solution would be the ability to select the
|buffer size in the TB; something I requested back when RLS posted his
|"what would you like to see" article.
|
|Btw, the way to tell if this is happening to you is if you see a lot
|of failures of the "expected C, got FAIL" type.
|
|-- 
|Larry Blair   ames!vsi1!lmb   lmb%vsi1.uucp@ames.arc.nasa.gov

Another problem can be flow control. I set up the tb with no flow control
and a locked interface speed and let uucp handle the flow. I'll be
happy to email register settings, but they're too boring to post.
--
Mike Murphy  Sceard Systems, Inc.  544 South Pacific St.  San Marcos, CA  92069
UUCP: {nosc,ucsd}!sceard!mrm     INTERNET: mrm%sceard.UUCP@ucsd.ucsd.edu