what is your pstn connectivity? did you grab a siptrace? if so, I. an look
at that if you like.
On Oct 18, 2011 2:27 AM, "Philippe Bechamp" <[email protected]>
wrote:

> Hi there,
>
> Wonder if anyone can help me troubleshoot a one way audio problem.
>
> First of all, everything works fine with Bria - I can call anywhere in any
> direction.
>
> The issue happens with Polycom IP450 phones.
>
> The setup had been working fine for weeks and weeks. Then one day, sound
> seems to progressively degrade when making outgoing calls. After a while,
> boom, the receiving party of calls originating from the IP450 hears us but
> we can't hear them. The problem lasted about 36 hours the went away on it's
> own or I am not sure what i did to make it go away.
>
> Now, two weeks later, this has happened again.
>
> I have updated the IP450 to the recommended version on the wiki.
>
> I have traced and traced. It does not seem to be a firewall/nat/helper
> issue as a) Bria works fine on the same subnet b) doing port copies on my
> switch, I can see the packets being sent to the hardphone.
>
> From my limited but growing understanding of SIP calls, the server -> phone
> direction seems doubled (though it might just look ok to me…). I can't hear
> a thing and the diagnostics / media statistics on the phone increment in the
> outgoing direction but not in the incoming direction.
>
> Anyone have any idea that could help me pin this down ? Might it just be a
> phone firmware issue ?
>
> I have supporting material if that can help.
>
> Thanks,
>
> Philippe.
>
>
>
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>
> Philippe Bechamp | Manager, IT / Security****
>
> Neuralitic Systems Inc.
>
>
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>
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