[asterisk-dev] Queries regarding Echo Cancellation in Zaptel-1.2.6

[Paul Cadach]

Hello,

Chan Kwang Mien wrote:
> Could you elaborate on the use of codec to increase delay ? From what I
> understood, if both Phone A and Phone B are using the same codec, there
> won't be any transcoding in the Asterisk PBXs.
>
> I was also hoping that Asterisk has a means to add delay to voice
> traffic.

Try
   show translation
to check how different codecs costs, then disable all codecs except most costly
on the link between Asterisk boxes. This will produce additional >=35 ms of
delay (about 20 ms for packetization plus at least 15 ms for encoding and
decoding for iLBC codec on mine Xeon box).


WBR,
Paul.