Your profile has late negotion enabled. I believe you can set inherit_codec=true, so that it will force A leg to use the same codec as B leg offered. On Thu, May 26, 2011 at 9:04 AM, Spencer Thomason < spencer@5ninesolutions.com> wrote:
Hello all, I have a problem regarding the codec negotiation on an outbound call. My setup is like this:
Polycom IP 650 (1-n) -NAT-> FS --> Our Signaling Proxy --> ITSP Proxy ---> ITSP Cisco GW
I'd like to use different codecs for different call paths (in order of pref), g729 in passthru only: IP-650 -> IP-650 G722, PCMU, G729 Inbound -> IP-650 PCMU IP-650 -> Outbound PCMU,G729
I have two sofia profiles, internal, public IPv4:5060 and external, public:IPv4:5080.
The phones use the internal profile and the external profile only communicates with our signaling proxy (no media proxy). On the internal one: CODECS IN G722,PCMU,G729,GSM CODECS OUT G722,PCMU,G729,GSM NOMEDIA false LATE-NEG true
External: CODECS IN PCMU,G729 CODECS OUT PCMU,G729 NOMEDIA false LATE-NEG true
I have inbound-codec-negotiation set to greedy on both profiles and on outbound calls set absolute_codec_string=PCMU,G729 to prevent transcoding. Note that mod_g729 is enabled for passthru only.
The problem I have is this: We use the dynamic routing module in OpenSIPS to select an outbound provider/GW, all support PCMU and G729. On one of the routes, the Cisco IOS GW on this route has G729, PCMU configured as its codec pref.
I have included a ladder diagram to better illustrate the problem but in a nutshell, the polycom negotiates PCMU with FS, FS asks for both PCMU and G729, the cisco GW sends G729 and FS sends a 488 because it can't transcode. I would like to keep G729 in the outbound prefs because some routes might not support PCMU. Should I set one of the profiles to generous, and if so which one?
When someone makes an outbound call the following happens (ladder diagram): http://pastebin.freeswitch.org/16380
Sorry for the novella, :-)
Thanks! Spencer
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