Carlos,
Echo might be a possible cause of the noise but it is strange you hear it also
on internal calls since they have very low latency.
Can you record a short sample with this noise or at least ask your customer to
provide a more detailed description of the noise ?
________________________________
From: Carlos Chavez <[email protected]>
To: [email protected]
Sent: Wednesday, November 14, 2012 12:45 AM
Subject: Re: [asterisk-users] Noise on phones while speaking...
On 11/13/12 4:31 PM, Mark Engelhardt wrote:
> Carlos,
>
> I think the noise you are hearing might echo cancelation that is broken or
> set incorrectly. Maybe the card and asterisk are both trying to echo cancel?
>
> Mark
>
> On Nov 13, 2012, at 1:52 PM, Carlos Chavez wrote:
>
>> I have a new install and the customer is complaining that they hear
>>noise on all calls, no matter if it is internal or external, desk phones or
>>softphones. The noise is only present when the user is speaking, not the
>>remote side. The remote side does not hear the noise, only the local user.
>>
>> We are using Asterisk .1.8.11-cert8 on a CentOS 6 machine with a Digium
>>AEX800 card and DAHDI 2.6.1. I really do not know how this noise is
>>generated. Where can I look? Why would a SIP to SIP call have this noise?
>>
>>
The card itself does not have hardware echo cancellation so we use
MG2. I am not fixated on the card because this should not affect a SIP
to SIP internal call unless the card is really defective and provides
bad timing to Asterisk.
--
Telecomunicaciones Abiertas de México S.A. de C.V.
Carlos Chávez Prats
Director de Tecnología
+52-55-91169161 ext 2001
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