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From: mkahl@world.std.com (Michael Kahl)
Newsgroups: comp.dcom.modems
Subject: Re: T2500 and PP9600SA dropping V32 connection
Message-ID: <1991May5.002308.12462@world.std.com>
Date: 5 May 91 00:23:08 GMT
References: <2583@key.COM>
Organization: The World @ Software Tool & Die
Lines: 27

In article <2583@key.COM> jbr@key.com () writes:
>I have a Practical Peripherals 9600SA modem (Rom version 1.29) which I
>use to connect to a Telebit T2500 (Rom version 6.1).  I connect using
>V.32/V.42/V.42bis.  The T2500 is the originating modem (I used callback
>security).  The connection works okay for a period of time and then
>the connection gets broken.  The 9600SA reports various causes (S86 = 4:
>physical carrier loss, or S86 = 12: normal disconnect initiated by remote
>modem, or S86 = 13: remote did not respond to repeated message; after 10
>attempts local modem terminated call).

I have exactly the same problem, only I have a Hayes Ultra 96 rather than a
Practical Peripherals 9600SA.  I've also heard of a MultiTech user having the
same problem, plus I see that jim@shograf.com has also replied to your post
reporting the same thing with an Intel 9600EX.

The common denominator in every report I've seen is that the other modem is
a Telebit T2500.  That says something, I think.

I don't have a solution.  The best workaround I have found is to limit the
connection to 4800 rather than 9600.  Not ideal, but for what I do 4800 with
MNP5 or v.42bis is plenty fast enough most of the time.  I tried this on the
advice of someone else who reported the same problem, and it works.  The
problem seems to be somehow specific to 9600 and doesn't show up at 4800.
-- 
Michael Kahl, Symantec Corporation
mkahl@world.std.com  -or-  75236.3146@compuserve.com
Disclaimer:  Keep this quiet; what my employer doesn't know won't get me fired.