UKVoIPTalk.com

I have a Linksys SPA3102 with firmware 5.1.7(GW). The FXS-port is
connected to a standard desk phone. FXO-port is connected to
NTL/Virgin Media PSTN-network. When I get an incoming PSTN-call to the
SPA3102, the phone starts ringing, but when I take it off hook the
call does not connect and another extension phone continues ringing.
I've adjusted everything I can think of based on what I've learned in
various forums over the last 48 hours, including adjusting Line-In-Use
Voltage. Resetting to factory defaults similarly provides no joy. An
earlier thread mentioned that FXS Port Impedance (Regional tab) should
be set on to 370+620||310nF, however this particular option does not
appear to be available in the drop-down box although it is for FXO
Port Impedance.

I'm at my wits end trying to think what the problem is and how to sort
it. The VOIP bit, where I expected most problems, seems to work just
fine, at least at the fairly primitive level I am aiming in at
present, using Voipcheap and Draytel. If anyone can offer help I would
be most grateful.

TIA

ChipMonk

which platforn do you use?

I’m sorry but I don’t understand the question, or its relevance if you
mean PC OS.
As additional info, I have noticed that the Line Voltage (under
Voice/Info) fluctuates randomly between ca. -11 and +11V and always
shows Hook State: on. This doesn’t seem right to me! Anyone else on
the NTL PSTN see anything like this? What should it be?
ChipMonk

ChipMonk wrote:[color=blue]
> I’m sorry but I don’t understand the question, or its relevance if you
> mean PC OS.
> As additional info, I have noticed that the Line Voltage (under
> Voice/Info) fluctuates randomly between ca. -11 and +11V and always
> shows Hook State: on. This doesn’t seem right to me! Anyone else on
> the NTL PSTN see anything like this? What should it be?
> ChipMonk[/color]

What does the line voltage show when the phone is ringing?

Earlier on you said:

"but when I take it off hook the
call does not connect and another extension phone continues ringing."

What do you mean? Have you got several phones connected to the FXS
port? If so what happens if you just connect one?

cheers,
Paul.

On Sat, 02 Jun 2007 16:40:54 GMT, ChipMonk
<unavailable@spamfreemale.con> wrote:
[color=blue]
>I’m sorry but I don’t understand the question, or its relevance if you
>mean PC OS.
>As additional info, I have noticed that the Line Voltage (under
>Voice/Info) fluctuates randomly between ca. -11 and +11V and always
>shows Hook State: on. This doesn’t seem right to me! Anyone else on
>the NTL PSTN see anything like this? What should it be?
>ChipMonk[/color]
The PSTN line voltage is usually about 50V (can obviously vary a bit)
but, from my experience, can vary quite a lot on a cable line.
On the 'INFO' tab, under PSTN, it shows the line voltage. I assume
that is where you are checking. The voltage shown shouldn't fluctuate
as you refresh the page.
Just yesterday I was setting up a 3102 for a friend on a Telewest area
line. Amongst other problems I found that the line voltage, indicated
by the web interface, was showing low and was fluctuating on page
refresh. I replaced the lead and there were no further problems. A
connecting lead, normally attached to a phone, is not suitable for
conecting the PSTN line to the ATA. We did find, however, that a modem
lead worked well. All I am suggesting here is that you change the lead
from the PSTN to the ATA, it could be something as simple as that
which is causing the problem for you.

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On Mon, 04 Jun 2007 11:40:53 GMT, Brian A
<no_spam_bca1000@hotmail.com> wrote:

[color=blue]
>The PSTN line voltage is usually about 50V (can obviously vary a bit)
>but, from my experience, can vary quite a lot on a cable line.
>On the 'INFO' tab, under PSTN, it shows the line voltage. I assume
>that is where you are checking. The voltage shown shouldn't fluctuate
>as you refresh the page.
>Just yesterday I was setting up a 3102 for a friend on a Telewest area
>line. Amongst other problems I found that the line voltage, indicated
>by the web interface, was showing low and was fluctuating on page
>refresh. I replaced the lead and there were no further problems. A
>connecting lead, normally attached to a phone, is not suitable for
>conecting the PSTN line to the ATA. We did find, however, that a modem
>lead worked well. All I am suggesting here is that you change the lead
>from the PSTN to the ATA, it could be something as simple as that
>which is causing the problem for you.[/color]

Thank you so much Brian A - problem solved after a PSTN to FX0 Line In
cable change. The irony is that I was aware of this potential problem
and had strictly used an old modem cable from the offset - but
obviously not all modem cables are equal either! Perhaps the one I
originally used was from a pre-voice modem and that caused the
problem. Who knows! Anyway, swapping for a more recent modem cable and
suddenly Line in voltage stabilised at -41V and the damned thing
works. You have made my day.

Many thanks

Chip
ChipMonk

On Wed, 06 Jun 2007 13:24:47 GMT, ChipMonk
<unavailable@spamfreemale.con> wrote:
[color=blue]
>On Mon, 04 Jun 2007 11:40:53 GMT, Brian A
><no_spam_bca1000@hotmail.com> wrote:
>
>[color=green]
>>The PSTN line voltage is usually about 50V (can obviously vary a bit)
>>but, from my experience, can vary quite a lot on a cable line.
>>On the 'INFO' tab, under PSTN, it shows the line voltage. I assume
>>that is where you are checking. The voltage shown shouldn't fluctuate
>>as you refresh the page.
>>Just yesterday I was setting up a 3102 for a friend on a Telewest area
>>line. Amongst other problems I found that the line voltage, indicated
>>by the web interface, was showing low and was fluctuating on page
>>refresh. I replaced the lead and there were no further problems. A
>>connecting lead, normally attached to a phone, is not suitable for
>>conecting the PSTN line to the ATA. We did find, however, that a modem
>>lead worked well. All I am suggesting here is that you change the lead
>>from the PSTN to the ATA, it could be something as simple as that
>>which is causing the problem for you.[/color]
>
>Thank you so much Brian A - problem solved after a PSTN to FX0 Line In
>cable change. The irony is that I was aware of this potential problem
>and had strictly used an old modem cable from the offset - but
>obviously not all modem cables are equal either! Perhaps the one I
>originally used was from a pre-voice modem and that caused the
>problem. Who knows! Anyway, swapping for a more recent modem cable and
>suddenly Line in voltage stabilised at -41V and the damned thing
>works. You have made my day.
>
>Many thanks
>
>Chip
>ChipMonk[/color]
Thanks for your comments. I'm pleased to have been of help.
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