I've got a very vexing issue. I converted a router over from MGCP to h.323. IOS Advanced IP Services 12.4-4(t). With MGCP there was never an issue with dropped calls. Ever since switching gateway over to h.323, any calls are dropped with alarming regularity within 5 minutes or less of call being established. I am using the VIC-2FXO-M1 as my gateway interface. I've been searching for information on this and have come up with nothing. Unfortunately, MGCP will not allow CallerID over MGCP using FXO at this time. I'm not sure what is causing this dropping of calls. Any ideas?
On another note, is it possible to setup a SIP trunk between CUCM to the router and still use the 79xx phones as SCCP? Not sure on that either. If it is something with h.323, that would be an alternative solution but I think unnecessary. The 79XX (type A) phones don't work as well using SIP unfortunately. Thanks for any information.