Let's say I have two devices configured and the follow call scenarios occur.
[100] disallow=all allow=g722&ulaw Polycom phone with g722,ulaw,alaw,g729 [101] disallow=all allow=ulaw Polycom phone with g722,ulaw,alaw,g729 101 dials 100 -> ulaw to ulaw is chosen 100 dials 101 -> g722 to ulaw is chosen Ideally when 100 dials 101 ulaw would be chosen since it is the common format. Looking into this deeper Device 100 sends INVITE to Asterisk offering g722,ulaw,alaw,g729 Asterisk sends INVITE to device 101 offering ulaw Device 101 sends 200 OK to Asterisk offering ulaw Asterisk sends 200 OK to device 100 offering g722,ulaw I can prevent transcoding by adding SIP_CODEC_INBOUND=ulaw to the dialplan for extension 101. This causes Asterisk to send 200 OK to device 100 offering ulaw. Am I missing why Asterisk wouldn't just offer the highest priority codec they have in common to prevent transcoding? Ryan
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