[asterisk-users] Clicking Noise on Pure Voip Calls

[Noah Miller]

Hi Carl -

> Setup:
> Asterisk server in NY.
> Cisco 7960 IP Phones in NY and London.
> Dedicated T1 from NY to Ldn.
>
> T1:
> Latency - 100ms
> Qos applied
> No errors
>
> Default codec on Ldn IP Phones = g711alaw
> Default codec on NY IP Phones = g711ulaw
> Both codecs allowed on each phone.

I'm guessing you're connecting the boxes with IAX.  Three questions:

1. What sort of QoS are you using (i.e. what are you tagging on - a
tos bit, port number, etc)?
2. What's your routing equipment?
3. Is there other traffic on this T1? If so, what?


> Issue:
> Calls on IP Phones from NY to London hear clicking
> noise on NY end.

But not the other way around?  Hmm.  Does the NY box host any other
phone traffic?  Any analog cards?  Have you tried connecting just a
basic IAX softphone to the NY box - does it suffer the same issues?

- Noah