I'm trying to create a SIP Trunk to a SIP service provider from a CallManager 4.2 server.
Has anyone got this working?
I get inbound/outbound call setup OK but no media. I've allow all IP traffic inbound from the external SIP server and also port forwarded UDP port 5060 to the CCM server.
I'm assuming that the ASA is clever enough to inspect the SIP signalling traffic and forward the media to the appropriate inside address (MTP or Transcoder depending on what we are doing) however I must ne missing something as this doesn't work.