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.<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; line-height: 19px; "></span></span><br>
<br><br><div class="gmail_quote">On Thu, May 26, 2011 at 9:04 AM, Spencer Thomason <span dir="ltr"><<a href="mailto:spencer@5ninesolutions.com">spencer@5ninesolutions.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hello all,<br>
I have a problem regarding the codec negotiation on an outbound call. My setup is like this:<br>
<br>
Polycom IP 650 (1-n) -NAT-> FS --> Our Signaling Proxy --> ITSP Proxy ---> ITSP Cisco GW<br>
<br>
I'd like to use different codecs for different call paths (in order of pref), g729 in passthru only:<br>
IP-650 -> IP-650 G722, PCMU, G729<br>
Inbound -> IP-650 PCMU<br>
IP-650 -> Outbound PCMU,G729<br>
<br>
I have two sofia profiles, internal, public IPv4:5060 and external, public:IPv4:5080.<br>
<br>
The phones use the internal profile and the external profile only communicates with our signaling proxy (no media proxy).<br>
On the internal one:<br>
CODECS IN G722,PCMU,G729,GSM<br>
CODECS OUT G722,PCMU,G729,GSM<br>
NOMEDIA false<br>
LATE-NEG true<br>
<br>
External:<br>
CODECS IN PCMU,G729<br>
CODECS OUT PCMU,G729<br>
NOMEDIA false<br>
LATE-NEG true<br>
<br>
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.<br>
<br>
The problem I have is this:<br>
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.<br>
<br>
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?<br>
<br>
When someone makes an outbound call the following happens (ladder diagram):<br>
<a href="http://pastebin.freeswitch.org/16380" target="_blank">http://pastebin.freeswitch.org/16380</a><br>
<br>
<br>
Sorry for the novella, :-)<br>
<br>
Thanks!<br>
Spencer<br>
<br>
<br>
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</blockquote></div><br>