http://www.rfc-editor.org/rfc/rfc3991.txt
RFC 3991: Media Gateway Control Protocol (MGCP) Redirect and Reset Package, B. Foster, F. Andreasen2005-02-01T23:00:00-00:00The base Media Gateway Control Protocol (MGCP) specification (RFC 3435) allows endpoints to be redirected one endpoint at a time. This document provides extensions in the form of a new MGCP package that provides mechanisms for redirecting and resetting a group of endpoints. It also includes the ability to more accurately redirect endpoints by allowing a list of Call Agents to be specified in a preferred order. This memo provides information for the Internet community.