Cisco Systems. Implementing Cisco Unified Communications IP Telephony. Part 1 Volume 2. Student Guide

Cisco Systems, 2008. — 444 p.Cisco Unified Communications Manager automatically routes calls to destinations within the same cluster. In order to enable off-net calls, such as to the public switched telephone network (PSTN), gateways have to be implemented and special dial plan requirements have to be considered.
This module describes how to configure Media Gateway Control Protocol (MGCP) gateways and how to create a dial plan providing endpoint addressing, path selection, calling privileges, digit manipulation, and call coverage for single-site Cisco Unified Communications Manager deployments.