Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!aurs01!luce
From: luce@aurs01.UUCP (J. Luce)
Newsgroups: comp.dcom.modems
Subject: Re: Line Noise Redux
Keywords: Line Noise
Message-ID: <59437@aurs01.UUCP>
Date: 15 Jan 91 13:49:56 GMT
References: <59426@aurs01.UUCP> <1991Jan13.113822.13888@chinet.chi.il.us> <1991Jan13.183631.27081@europa.asd.contel.com>
Sender: news@aurs01.UUCP
Reply-To: luce@aurw46.UUCP (J. Luce)
Organization: Alcatel Network Systems, Raleigh NC
Lines: 56

In article <1991Jan13.183631.27081@europa.asd.contel.com> enger@seka.scc.com writes:
>
>SLIC-96 is indeed a "carrier" based, pair-gain system.
[Stuff deleted]
>and placed on a Fiber span.
>
>At any rate, all of this means that you are indeed in "4-wire" mode
>between your premesis and the CO.  So, you may have problems wiht
>the interface card in the SLIC, etc.
>

True enough.

>
>SECOND point.  From what I've read of the problem, the situation
>is asymmetric:  Outside callers dialing INTO your modem see the problem.
>
>The following experiment might provide an interesting data point:
>find a willing outside caller that REPEATABLY gets the problem when dialing
>into your modem.  Then, try initiating an OUTGOING  call from your 
>troublesome modem TO the outside caller.  This will reverse the usage
>of the low/high frequencies.  If the problem reverses, then maybe it
>is a frequency dependent line degredation of some sort.
>
>Best wishes,
>Bob Enger
>enger@seka.scc.com

This is called Engineering stupidity on my part. Bob, that is something
I should have done early on but did not (can you say 'Dumb' boys and
girls? I knew you could). 

I did just that last night after getting this and Voila!! there was the
line noise, BUT!!! Outbound once again. I saw the line noise (due to the
other end echoing I think, because the crap showed up in the msgs I
would enter). ::sigh::

OK, campers, what is next. Is there anything I can do to increase my
outbound signal to basically 'pierce' the noise (you can tell I write
s/w and not 'do' hdwe). Or is that a fantasy. Anyway at all I can take
some control from my end.

Oh, yes, a comment from the SoBell Sr. Tech ... "You will probably need
a data line put in, but that is expensive...". Harrumph...

Thanks once again for all your help, at least I ask intelligent
questions to drive SoBell nuts... :)



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