TELECOM Digest OnLine - Sorted: Re: Cordless Phone Does Not Ring

Re: Cordless Phone Does Not Ring
1 Mar 2007 10:21:58 -0800

On Feb 28, 5:33 pm, wrote:

> I am facing a baffling problem. I have a corded and a cordless phone
> hooked in my apartment along with AT&T DSL internet on the same phone
> line.

> Few days back my 900Mhz Uniden cordless phone stopped ringing whenever
> there used to be incoming call. My corded phone continue to ring and I
> could even use either phones to answer the calls. There was no problem
> for outging calls also from either phones. Some times for incoming
> calls the corded phone use to ring only once and gets directly
> connected. I picked any of the phones I could answer the call.

> I thought it could be a problem with the Uniden phone and purchased a
> 2.4Ghz GE phone. It also behaved exactly the same way. Both the
> cordless phones have answering system, which is also not working. I
> checked GE and Uniden cordless phones at my friends place along with
> all the DSL filters. Surprisingly the phones and answering system
> worked just fine.

> Now I felt the problem is with my telephone service / Line. I got it
> checked from At&T and they informed me the line is ok. He mentioned it
> could be due to "Interference" with wireless network. I tried using
> the phones without DSL and without wireless routers. Things did not
> change. Now I am wondering if wireless networks in my apartment
> vicinity (there are several of them) are interfering with my cordless
> system? Can any body explain the phenomenon and the way to solve it?

> [TELECOM Digest Editor's Note: The first thing which came to mind was
> not that there was 'interference'. If there was 'interference', you
> would occassionally hear 'static' or something similar on the line
> when you were using it. Also, you would probably receive spurious
> ringing (no rhyme nor reason to it; just occassional tingles from the
> ring-making device on the cordless phone) when the 'interference'
> bothered the cordless unit. Before you go around polling your
> neighbors to see about their cordless phones and wireless apparatus,
> I would first go by the clues you gave in your first paragraph:
> (1) You recently got AT&T DSL service. and (2) the cordless phone
> only rang _once_ and was directly connected. That 'one ring and then
> connected' sort of sounds ot me like a short on the line. Not enough
> of a short to make your line totally busy but enough of a short that
> with sufficient ringing voltage (as oppposed to voltage to talk with)
> something is happening.

> I'd try unplugging all the phones and the DSL incoming line. Then do
> a controlled test where you place a call to yourself (maybe from a
> cell phone?) with _only_ the wireless phone plugged in where you
> normally have the wired phone plugged in. See if your wireless phone
> and its answering machine now start working, or see if you can make
> the cordless phone 'ring once' and then be connected. If it does work
> okay at that point, then the hassle is in the wiring of one or more of
> your phone outlets. I suggest that in most cases with wireless phones
> and answering machines, only two wires are used; for simplicity, the
> red and the green. But sometimes, on cordless phones and answering
> machines the outside pair (yellow and black wires number 1 and 4) are
> also used. Is your answering machine set up to cut off whenever a
> phone is picked up? If that is the case, then sometimes the
> yelllow/black wires 1 & 4 are 'jumpered' to green and red (wires 2 &
> 3) inside the phone somehow or _maybe_ in the wall box. After you do
> these litle experiments I suggested, get back to us here and
> _carefully_ document what happened. PAT]

Pat thanks for you response and attention.

I unplugged all the phones and DSL for 10 min and then reconnected only
the cordless phone. Then called the number from my cell phone. The
phone do not ring for incoming calls nor the answering machine.
Outgoing calls and dial tone are working fine. In fact cordless phone
do not ring at all whether connected stand-alone or with corded phone.
The phenomenon started just a couple of weeks back, before that
everything was working file for past 3 months with the same set-up. I
tried 3 different phone jacks in my apartment with 2 different
cordless phone (900Mhz & 2.4Ghz) which works fine in my friend's
place. Please suggest. Thanks

[TELECOM Digest Editor's Note: Now for the next part of this
experiment, let's repeat the above, but when you *know* an incoming
call is coming in (because you are placing it from your cell phone)
try _answering_ the cordless phone, just pick it up and see if you
can talk to yourself. Let's detirmine if in fact there is some trouble
with the ringer but the connection is good otherwsie. Let's also try
listening to what the cell phone is receiving while we do this: Is
it ringing in your ear normally, or ringing once or one-half time
then stopping, etc. Emulate an incoming call to yourself. PAT]

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