Hello, FreeSWITCH Version 1.3.17+git~20130318T211211Z~2dc3b47db1. The config is a basic SBC to handle NAT traversal between public and private interfaces. Proxy-media mode is configured. Inbound call from carrier hits us with G711u and G729 in the SDP, in that order. Inside PBX chooses G711u and call is established. 30 minutes later the carrier does a session refresh with a re-INVITE with an identical SDP as the initial INVITE. When FreeSWITCH the re-INVITE leaves FreeSWITCH towards the inside PBX, the attached SDP has G711u and G729 are flipped such that G729 is now preferred. The PBX accepts the G729 request and the session switches to G729. There are no SDP smarts in the dialplan. Codecs are not handled at all by design. Is this something that could be caused by a misconfiguration? Or, is my next step a jira? - Jeff