If any one is running a 3662 config as an MGCP device in CM 3.1 will you please email me the gateway configs. I am using the 3662 with PRI's going to the PSTN.
Can't use PRIs for MGCP with 3600/2600 yet. The IOS features to support the specific operations required has not yet been released.
The first IOS platform that will be able to do this is the VG200, in what should be called 12.2(2)XN and it is scheduled for mid to late September.
The 2600/3600 will come after. In the meantime, on a 3660 all you can do is FXO/FXS MGCP, or if you need PRI you need to stick with H.323 for now.