[cisco-voip] PSTN rings once, router answers, then silence...

[Tom Storey]

Hi all,

There is no MGCP in this configuration that I am aware of, but I do have
the router registering with a VoIP provider using SIP.

Thanks.
Tom

> MGCP?
>
> have you checked on the CM and the VGW that everything is registered?
>
> Scott
>
> On Mon, Jan 26, 2009 at 11:34 PM, Tom Storey <tom at snnap.net> wrote:
>
>> Hi all.
>>
>> I have a 1760 with a VIC-2FXO and VIC-2FXS. I have connected the phone
>> to
>> FXS port 3/0, and the PSTN to FXO 2/0, and Im running into a strange
>> issue.
>>
>> Sometimes when a call comes in via the PSTN the caller will hear a
>> single
>> brief ring, being the PSTN ringing, they will then hear the 1760 pick up
>> due
>> to the ringing stopping, but then there will be silence and the phone
>> attached to the FXS port will not ring.
>>
>> Every other time when a call comes in there will be a single brief ring
>> and
>> the 1760 will answer and produce its own ringing tone, and the phone
>> attached to the FXS port will ring.
>>
>> There doesnt appear to be any particular sequence of events to cause it
>> to
>> happen that I have been able to work out. Its just completely random.
>>
>> Can anyone suggest any settings that I can adjust (Im trying "ring
>> number
>> 2" at the moment to see how that goes) that might cease this behaviour,
>> or
>> suggest any debug commands that I can run to try and capture what is
>> going
>> on?
>>
>> Unfortunately its just a residential line, so there arent that many
>> calls
>> made in so it might take a while before it happens again. But thats all
>> part
>> of the fun right? ;-)
>>
>> Cheers,
>> Tom
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>>
>