/mcpIn case of overlap dialing, a null called number does not match incoming called-number T because timeout has not occurred. • A null called-number can match incoming called-number T only in case of ENBLOCK and there is no match either because of answer-address and port-number. The warning displayed when an administrator configures incoming called-number T refers to this specific case. • Class of Restriction Class of Restriction (COR) is a way to limit calls on a Cisco Gateway. COR is often described as a lock and key mechanism. Locks are assigned to dial-peers with an outgoing COR list. Keys are assigned to dial-peers with an incoming COR list. When COR Lists are applied, the available outbound dial-peers are those that the key can unlock. This filtering occurs before the rest of the outbound dial-peer matching methods are then checked. Two important rules with Class of Restriction: If there is no outgoing COR list applied the call is always routed. 1. If there is no incoming COR list the call is always routed. 2. Configuration of Class of Restriction (COR), Logical Partitioning Class of Restriction (LPCOR), and LPCOR with Forced Authorization Codes (FAC) are beyond the scope of this document but these documents can be referenced for further reading. COR Configuring Class of Restrictions (COR) LPCOR w/ CME CME with LPCOR Configuration Example LPCOR w/CME and FAC Cisco Unified Communications Manager Express System Administrator Guide Cisco Unified Communications Manager Express (CUCME) Dial-peers CME creates system dial-peers for ephones and voice register pools. These cannot be seen in the running config. To make changes to the CME dial-peers, the changes need to be done on the actual ephone or voice register pool. When viewing show dial-peer voice summary outputs, the dial-peer starting with 2000 are SCCP ephones and dial-peers starting with 4000 are SIP voice register pools. This dial-peer shows up as the inbound dial-peer for calls from CME registered phones and the outbound dial-peer in debugs for call to CME registered phones. Example Output for show dial-peer voice summary with CME.