I have created the following extension: <extension name="my_test"> <condition> <action application="bridge" data="{absolute_codec_string='PCMA,PCMU,GSM'}sofia/external/ 1001@192.168.1.78"/> <action application="hangup"/> </condition> </extension> then i call to this extension, freeswitch dials to 1001@192.168.1.78 and when i check the content of SDP, included in a SIP packet, i see something like this: v=0 o=FreeSWITCH 1401972565 1401972566 IN IP4 192.168.1.65 s=FreeSWITCH c=IN IP4 192.168.1.65 t=0 0 m=audio 17262 RTP/AVP 8 0 101 13 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:20 why my codecs from 'absolute_codec_string' are not included in SDP? I would expect to see these lines included: a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:3 GSM/8000