When using grandstream ata 486, it works only with the two cedecs(alaw and ulaw), which are very unffecient.
When I force any other codec Asterisk writes:
chan_sip.c:2765 process_sdp: No compatible codecs!
And I hear only beeping. Everything else works fine.
Does anybody has got a similar problem? It seems that the only one with this problem is me.
I'm using asterisk with 5-8 SIP providers with all the codecs without any problem.