Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!randvax!edhall
From: edhall@rand.org (Ed Hall)
Newsgroups: comp.dcom.modems
Subject: Re: T1600 Dropping carrier
Message-ID: <1991Jun12.055725.12897@rand.org>
Date: 12 Jun 91 05:57:25 GMT
References: <1991Jun11.182111.7088@agate.berkeley.edu>
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Organization: The RAND Corporation
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In article <1991Jun11.182111.7088@agate.berkeley.edu> gnn@heisenberg.Berkeley.EDU (George Neville-Neil) writes:
>	While logged in to work (which is either a T1600 or T2500) the
>modem will unexpectedly drop carrier.  There are no noise characters
>or the like.  I just get the message NO CARRIER.  This is 9600 baud
>mode.

I occasionally have the same problem (the other end in my case is a
USR Dual Standard).  Line quality was generally good (it's a V.32/V.42
connection and I've checked the appropriate S register for a count of
retransmissions--and there were few, if any).

The connection just up and dies without warning.  This happens about
every four hours or so of connect time.  The last time it happened, I
had just transfered a couple megabytes of data (which proceded at full
speed) and was idling for a moment.

This is with 1.00 ROMS.

		-Ed Hall
		edhall@rand.org

P.S. No, I don't have call-waiting, and it has nothing to do with
TELCO automatic line testing.  I'm mystified.