android - Does my asterisk server need the same codecs as my mobile app? -


right now, both android , iphone voip app using g711 codec. asterisk server set allow ulaw codec, understand same g711.

now want start using g729 codec on android , iphone voip app. i've upgraded the sip library on these apps support this.

do need install g729 codec on asterisk server in order android , iphone voip app talk each other?

the short answer no, don't need install g729 codec need enable in sip.conf file allow codec pass-thru.

asterisk g.729 pass-thru

the long 1 is: depends on requirements. features demand decoding/transcoding work and, in case, need install g729 codec in asterisk, like:

  • direct pstn termination (not through sip trunking service);
  • direct connected extension (not sip ata/iad)
  • voice conferencing
  • silence detection
  • ...

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