NetNews Usenet Archive 1992 #31/NN_1992_31.iso/spool/comp/dcom/modems/18677

Text File | 1992-12-30 | 2.6 KB | 48 lines

Newsgroups: comp.dcom.modems
Path: sparky!uunet!portal!lhaven.UUmh.Ab.Ca!combdyn!lawrence
From: [e-mail] (Lawrence Chen)
Subject: Re: HELP! problems with 2-line phones
Message-ID: <[e-mail]>
Organization: Combustion Dynamics Ltd.
References: <[e-mail]> <[e-mail]>
Date: Tue, 29 Dec 1992 18:12:44 GMT
Lines: 37

In article <[e-mail]> [e-mail] writes:
>[e-mail] (Joel Atkin) writes:
>
>>Help!  My supra v.32bis modem, which is billed as handling line noise
>>fairly well, drops the carrier every time my other line rings.  I have
>>5 two line phones hooked up throughout my house on sockets I've wired
>>for two lines.  When I remove all of the phones, presto!, carrier is
>>not dropped when the other line rings.  I have tried each phone
>>individually and they all seem to cause line noise on the other line
>>(line2) when line1 rings.  These phones are essential and I was
>>wondering if there was some way to suppress this overlapping effect.
>
>Many modems use the 2nd pair on the jack as if it was an old fashioned
>"key system" multiline phone. So what you want to avoid both having
>the phones interefere with the modem *and* the modem interfere with the
>phone is a little gizmo from Radio shack that splits the 2-line jack into
>3 jacks. A 2-line jack, a line 1 jack, and a line 2 jack. The single
>line jacks have *only* the 2 wires required brought thru and that eliminates
>most problems.
>
I had forgotten about this posibility....I have a GE answering machine that
seems to exhibit this behaviour.  I found that people couldn't hear the OGM,
if the modem line was active.  Now that its on a FAX/PHONE switcher that
doesn't pass the 2nd pair, the problem has disappeared.

However, the FAX/PHONE switcher doesn't detect extension pickups and the
answering machine still gets connected to the line.  Actually, it'll detect
extension pickups after the machine kicks in, but not before.  By then most
people who call me hang up when they hear the machine.  I'm starting to think
that I should put a modem directly on the line and not bother with voice
callers anymore.
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