I'm having some issues setting up an H323 trunk between Call Manager 5.1 and CME 7.1. The CME router is connected back via a VPN tunnel within the router back to the ASA at HQ. So far I have setup the h323 gateway on the CCM using the IP of the CME router with a Route Pattern using that Gateway. On the CME side I setup the dial-peer and voice service voip as follows:
dial-peer voice 5000 voip
session target ipv4:192.168.11.21
voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
When I call from CCM to CME, the calls go through fine, though from CME to CCM, I get a busy after about 10 seconds. When I do a debug voip ccapi inout, it shows that the call goes through the correct dial-peer, though I get an error cc_api_call_disconnected: Cause Value=38.
I've been racking my head trying to figure this one out without any success, so any help would be greatly appreciated.