Hi all...
So I have a third party softphone (MicroSIP) that I have configured with a CUCM 15, so that I can easily see what SIP messages are being sent via pcap taken from my machine. Calls from this softphone are fine, and there are no issues with calls to other DNs on the CUCM.
I also have a SIP trunk configured, that is pointing to a media application server (dialogic XMS), which is operating fine, as I am able to fire calls down that trunk to the gateway and then answer those calls.
I am trying to get early media operating over that sip trunk. I have captured a pcap from where the softphone is running, and a pcap of where the media application is running. I can see the INVITE being sent to the CUCM with a SIP/SDP, and I can see the corresponding SIP INVITE being sent from the CUCM down the trunk to the media application, however there is no SDP with that message... only SIP. Due to there being no SDP, it means I cannot get early media working properly.
Here are some config settings from the sip profile being used for the trunk...
What am I doing wrong here with my config? Shouldn't the SDP be sent with the INVITE down to the media application at the end of the trunk with the above settings, specifically the REL1xx options and MTP?
