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Path: utzoo!utgpu!water!watmath!dalcs!dalcsug!dalegass
From: dalegass@dalcsug.UUCP
Newsgroups: comp.dcom.modems,comp.sys.ibm.pc
Subject: Re: modem troubles
Message-ID: <181@dalcsug.UUCP>
Date: Tue, 3-Nov-87 07:44:24 EST
Article-I.D.: dalcsug.181
Posted: Tue Nov  3 07:44:24 1987
Date-Received: Fri, 6-Nov-87 05:13:01 EST
References: <179@dalcsug.UUCP>
Organization: Dalhousie University, Halifax, N.S., Canada
Lines: 27
Xref: utgpu comp.dcom.modems:993 comp.sys.ibm.pc:8284
Summary: Solution found (no thanks to netlanders)

In article <179@dalcsug.UUCP>, I write:
> However, if, after sending this high-pitched tone, certain noise (but not
> a valid carrier) is received by the modem from the phone line (busy signals,
> dial tones, or any shhhhhh sound), then the modem response with a harsher
> carrier (shhhhh--which I think is normal) and hangs bad, probably looking
> for a valid carrier, after hearing some indication of noise.
> Nothing short of a power-down will remedy this hangup (dropping DTR fails,
> +++ fails, etc. etc.)
> 

Well, I found a solution for this, in case anybody is having similar problems.

It seems that the cause of this was that the 'baah baah' was being mistaken
for a candidate for a carrier.  My register S9 (time to wait for a valid
carrier) was 8/10ths of a second, and this 'baaah' of a busy signal fell
within this threshold.  Once it thought it might be a carrier, it would not
give up.

By setting S9=30 (3 seconds, probably doesn't need to be that high), my modem
no longer mistakes busy signals or noisy connection 'clunk's as carriers,
and I have had it freeze on me since.

Once again, the net provides no answers, and the problem is solved at home...

Just hope this helps someone...

-swabe