Klaus Darilion wrote: > Hi! > > For a certain application where uplink is low bandwidth and downlink is > high bandwidth I want to use the best available codec - ie. up G729, > down G.711. > > How can I setup such an asymmetric session? > > eg. > high down > Alice ------------ Bob > up low > > I think if Alice announces G711 and G729, and Bob answers with G.729, > Alice must send with G729 and Bob can send with G711 too. Is this correct?
As far as I know it's correct. In fact, Bob can even mix both 711 and 729 frames within a stream as he sees fit. > Nevertheless, as this requires that Alice's SIP client support this. Is > there also a method to explicitly define the asymmetric behavior? In one of product I worked on we relied on this functionality to inject pre-encoded announcements into the RTP stream using the RTPproxy. All popular SIP clients and carrier equipment we've tested to date handled this correctly. Regards, -- Maksym Sobolyev Sippy Software, Inc. Internet Telephony (VoIP) Experts T/F: +1-646-651-1110 Web: http://www.sippysoft.com MSN: sa...@sippysoft.com Skype: SippySoft _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
