By setting global_codec_prefs and inbound_codec_prefs it's possible to specify, which codecs are supported for inbound calls. How can I specify that the switch shall support g729, but not g729b? The incoming INVITE message contains a SDP with the media attribute annexb=yes. How has Freeswitch to answer to indicate that g729 is supported but g729b is not supported? Thank you in advance Jan -- Jan Riedinger Phone : +49-30-39 73 19 66 Dipl.-Inf. | Managing Director Fax : +49-30-39 73 19 64 E-Mail: riedinger@sns.eu SNS Consult GmbH ICQ : 163-237-041 Südwestkorso 49a MSN : jan@sns-consult.de 14197 Berlin GERMANY Skype : Jan Riedinger AG Charlottenburg - HRB 71973