re-INVITE on SIP-H323 GW

mkt.cisco · ‎06-17-2008

I'd like to know the following specification of Cisco IOS 12.4 on SIP-H323 GW.

When SIP GW sends re-INVITE with a codec to SIP-H323 GW, which codec is prefered, the default codec of dial-peer or SIP side codec?

Any input would be greatly appreciated. Thanks in advance.

paolo bevilacqua · ‎06-18-2008

Hi, router accepts all the codecs that are configured for the "voice class codec" under voip DP.

If a fixed coded is configured, only that one is accepted. By default, that is g.729.

mkt.cisco · ‎06-18-2008

Hi, thanks for your reply.

I have tested this call and the result shows unfortunately SIP GW's codec, althogh the rule you mentioned is applied to initial INVITE. Why does re-INVITE neglect the codec which is set by dial-peer?

paolo bevilacqua · ‎06-19-2008

Hi, what I'm telling you, is that if you want multiple codes to be allowed with a voip DP, you need to configure a voice-class coded and apply it to the DP.