asterisk users - Nov 2007 - quality after call transfer

Hi,
  We are using attended call transfer to transfer the call.  In the
direct call, the quality of the voice and dtmf are acceptable.  After
transfer, the quality becomes worst.  Voice can't be heard clearly and
dtmf wrong detection will occur sometime.  I wonder call transfer will
affect he quality of the call.  Anyone has same experience?  Anything
to do in asterisk level can get a better quality after call transfer?

Hi,

I suspect that you are "transcoding", meaning that the call is comming
in a
specific codec format, and the second phone uses another codec. So, when you
do your tranfert, Asterisk is in the middle and is coding from the original
to your phone with two different codecs. If you are passing from G711 to
GSM, for example, it's normal that the audio quality is worst.

Best Regards,
Francois BERGERET


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Envoy? : mercredi 21 novembre 2007 03:25
A : Asterisk Users Mailing List - Non-Commercial Discussion
Objet : [asterisk-users] quality after call transfer


Hi,
  We are using attended call transfer to transfer the call.  In the
direct call, the quality of the voice and dtmf are acceptable.  After
transfer, the quality becomes worst.  Voice can't be heard clearly and
dtmf wrong detection will occur sometime.  I wonder call transfer will
affect he quality of the call.  Anyone has same experience?  Anything
to do in asterisk level can get a better quality after call transfer?