I have a CUCMBE and a Cisco 2821. I see in some post the CCM (v3.1) doesnt support MGCP with E1 CAS. I would like to know if this still valid with CUCMBE (v 6.x).
This restriction is still applicable in all CCM Versions including CUCM-BE :)
Restrictions for MGCP PRI Backhaul and T1 CAS Support
â¢Voice interfaces on the NM-HDA and the AIM-VOICE-30 are not supported.
â¢Integrated access, in which the channels on a T1 or E1 interface are divided between a group used for voice and another group used for WAN access, is not supported when voice is controlled by Cisco Unified Communications Manager through MGCP.
â¢T1 and E1 protocols, such as QSIG, E1 R2, T1 FGD, and PRI NFAS, are not supported with MGCP only with H.323.
â¢E1 CAS is not supported.
Cisco CallManager can use H.323 gateways that support E1 CAS, but you must configure the E1 CAS interface on the gateway.
From this doc;
MGCP and H.323 Voice Gateway Protocol Comparison
Hope this helps!