Specifications

Mediatrix 4100 61
C HAPTER
4
MGCP Protocol Features
This chapter describes how to set information exclusive to the Media Gateway Control Protocol (MGCP). It
assumes that the Mediatrix 4100 unit currently runs the MGCP protocol or that you will switch the unit to this
protocol.
The MGCP signalling programs and information are defined in a MGCP stack. This includes Call Agent
information and addresses, media package settings, etc.
Introduction
When the Mediatrix 4100 runs the MGCP protocol, it uses the mgcpMIB. This MIB is located in the Media5
MIB architecture.
 To use the MGCP MIB:
1. In the telephonyMIB, locate the telephonyIpSignalingProtocolSelection variable.
This variable allows you to switch from one protocol to another.
2. Set the telephonyIpSignalingProtocolSelection variable to mgcp.
3. Restart the Mediatrix 4100.
After the unit restarts, it uses the selected protocol.
MGCP Information
The Mediatrix 4100 uses IETF RFC 3435 - Media Gateway Control Protocol (MGCP) Version 1.0. F.
Andreasen, B. Foster. January 2003. MGCP is a protocol for controlling Voice over IP (VoIP) Gateways from
intelligent external call control elements. MGCP uses the Master/Slave concept, where external call control
elements are the Masters, while the devices connected to them (such as the Mediatrix 4100), are the Slaves
and only obey orders given by the Master.
The Mediatrix 4100 is used with any MGCP Call Agent (also known as Connection Manager), which manages
calls from and to the Mediatrix 4100.
Services Provided
The Mediatrix 4100 uses the services provided by the Call Agent. See your Call Agent documentation for more
information.