Or use the Sipxtapi function: 

 

sipxConfigSetAudioCodecByName( sipxInstance, « PCMA » ) ;

 

rgds,

 

stipus

 

De : [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] De la part de Paulo
Vicentini
Envoyé : jeudi 9 octobre 2008 18:34
À : [email protected]
Objet : Re: [sipxtapi-dev] negotiation of audio codec

 

asterisk Sip.conf:
Allow=alaw

but Sound quality might be degraded by network issues (packet loss, delay)
or Asterisk server limitations (CPU) etc

Paulo

On Thu, Oct 9, 2008 at 1:16 PM, Karsten Schubotz <[EMAIL PROTECTED]> wrote:

Hi all,

I have a question concerning negotiation of audio codec.
I'm using codec_pcmapcmu included in sipXtapi. If I make a direct connection
between two softphones using sipxtapi, the negotiated codec is PCMA. The
voice quality is good! But by making a connection over an Asterisk server,
the codec PCMU was negotiated. The voice quality is really bad. It sounds
interruptedly, and the pitch of the voice seems to vary irregularly.
Something didn't match. Does someone have an Idea what the cause could be?
Perhaps I can influence the codec negotiation, so the PCMA codec could be
used-> is it possible?
Thank you very much for a solution!

Regards
Karsten

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