asterisk users - Feb 2013 - cisco 7940 and asterisk 11

Ever since we upgraded to asterisk 11 we have had audio problems with
our cisco 7940 phones.

The problems manifest themselves by the conversation turning "robotic"
or into silence (to the extent our agents are saying "hello? hello?"
and the customer is saying "I hear you just fine"

We had to change pedantic=no in sip.conf to allow the phones to register

We are assuming that it is the phone<=>asterisk combination because

a) the call recordings of the conversation are perfect (no noise on
the line, conversation is clear) but it is apparent that the agent
cannot hear the customer sometimes (Hello?)

b) we have replaced the cables and switches between the phones and the pbx

c) we don't have the same problem with Aastra 9133i or Polycom 331 phones

Are there any settings in sip.conf that may help this , or a
particular firmware ? Are there any known audio problems with cisco
7940 and asterisk 11 ?

Many thanks

Julian

-- 
Julian Lyndon-Smith
IT Director, Dot R Limited

"I don?t care if it works on your machine!  We are not shipping your
machine!?

The kangaroo dances: http://www.youtube.com/watch?v=MAWl5iYOaUg

very polite *bump*

this is a real issue for us - anyone got _any_ clues or ideas ?

Thanks ;)


On 12 February 2013 14:29, Julian Lyndon-Smith <asterisk at dotr.com>
wrote:
> Ever since we upgraded to asterisk 11 we have had audio problems with
> our cisco 7940 phones.
>
> The problems manifest themselves by the conversation turning
"robotic"
> or into silence (to the extent our agents are saying "hello?
hello?"
> and the customer is saying "I hear you just fine"
>
> We had to change pedantic=no in sip.conf to allow the phones to register
>
> We are assuming that it is the phone<=>asterisk combination because
>
> a) the call recordings of the conversation are perfect (no noise on
> the line, conversation is clear) but it is apparent that the agent
> cannot hear the customer sometimes (Hello?)
>
> b) we have replaced the cables and switches between the phones and the pbx
>
> c) we don't have the same problem with Aastra 9133i or Polycom 331
phones
>
> Are there any settings in sip.conf that may help this , or a
> particular firmware ? Are there any known audio problems with cisco
> 7940 and asterisk 11 ?
>
> Many thanks
>
> Julian
>
> --
> Julian Lyndon-Smith
> IT Director, Dot R Limited
>
> "I don?t care if it works on your machine!  We are not shipping your
> machine!?
>
> The kangaroo dances: http://www.youtube.com/watch?v=MAWl5iYOaUg
>


-- 
Julian Lyndon-Smith
IT Director, Dot R Limited

"I don?t care if it works on your machine!  We are not shipping your
machine!?

The kangaroo dances: http://www.youtube.com/watch?v=MAWl5iYOaUg
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