Path: utzoo!censor!geac!torsqnt!hybrid!scifi!bywater!uunet!aurs01!luce
From: luce@aurs01.UUCP (J. Luce)
Newsgroups: comp.dcom.modems
Subject: Re: Line Noise Redux
Keywords: Line Noise
Message-ID: <59420@aurs01.UUCP>
Date: 9 Jan 91 15:19:32 GMT
References: <1991Jan7.211230.8874@svc.portal.com> <0B1gV2w163w@ersys.uucp>
Sender: news@aurs01.UUCP
Reply-To: luce@aurw46.UUCP (J. Luce)
Organization: Alcatel Network Systems, Raleigh NC
Lines: 43

In article <0B1gV2w163w@ersys.uucp> ersys!davem@nro.cs.athabascau.ca (Dave McCrady) writes:
>gundrum@svc.portal.com writes:
>
>> > The BBS phone line has it's own jack and own inhouse wiring. Well,
>> > almost, there is a 2nd line on it used for a 2nd modem at 1200 baud.
>> 
>> I know this may seem stupid, but try tesing the line with the second 
>> modem physically disconnected from the line. We spend a lot of time 
>> in our office daisy-chaining modems. We have occasionally noticed
>> cheaper modems causing noise on the line when they are turned OFF.
>> 
>> I don't know enough about the technology to say why this happens, but
>> it is easy enough to check out, why not give it a shot?
>> 
>
>  I had a similar experience that drove me nuts until I remembered that I 
>had the modem in my Toshiba laptop connected to the line.  Taking it off
>solved it ... would appear some equipment doesn't like to share...
>
>
>   Dave McCrady                 |  davem@ersys.uucp 
>+1 403-454-4054 (voice)         |  ersys!davem@nro.cs.athabascau.ca
>+1 403-454-6093 (public USENET) |  decrwl!alberta!aunro!ersys!davem

The second modem is on a different pair of wires inside the same 4-wire
cable. So, I cannot believe that when the modem is shut off that it
creates a problem :)

OK, 1 other thing (BTW, Thanks FLOYD for the reply, it has caused the
following to come to light):

After harrassing SoBell to get me off my current line card, I found I
was on a SLC-96 attached to an AT&T FP-20 (??? not sure). Anyway, it is
the oldest switch in the Raleigh area and is ANALOG. Since the move to a
new frame and a new line card, the problem is the same. Supposedly I am
on copper all the way to the switch (I find it AMAZING no one knows for
sure...).

OK, let's assume I am, is the T-clock still a valid concern. Since the
change of line card, the noise persists but now is of repeating
characters and not just a jumble of characters.

Thanks for the help...