Cisco Systems MGCP Inspection

12-12
Cisco ASA Series Firewall ASDM Configuration Guide
Chapter12 Configuring Inspection for Voice and Video Protocols
MGCP Inspection
– Regular Expression Class—Lists the defined regular expression classes to match.
– Manage—Opens the Manage Regular Expression Class dialog box, which lets you configure
regular expression class maps.
•Media Type Criterion Values—Specifies which media type to match.
– Audio—Match audio type.
– Video—Match video type.
– Data—Match data type.
•Multiple Matches—Specifies multiple matches for the H.323 inspection.
– H323 Traffic Class—Specifies the H.323 traffic class match.
– Manage—Opens the Manage H323 Class Maps dialog box to add, edit, or delete H.323 Class
Maps.
•Action—Drop packet, drop connection, or reset.
MGCP Inspection
This section describes MGCP application inspection. This section includes the following topics:
•MGCP Inspection Overview, page12-12
•Select MGCP Map, page 12-14
•MGCP Inspect Map, page 12-14
•Gateways and Call Agents, page 12-15
•Add/Edit MGCP Policy Map, page12-15
•Add/Edit MGCP Group, page12-16
MGCP Inspection Overview
MGCP is a master/slave protocol used to control media gateways from external call control elements
called media gateway controllers or call agents. A media gateway is typically a network element that
provides conversion between the audio signals carried on telephone circuits and data packets carried over
the Internet or over other packet networks. Using NAT and PAT with MGCP lets you support a large
number of devices on an internal network with a limited set of external (global) addresses. Examples of
media gateways are:
•Trunking gateways, that interface between the telephone network and a Voice over IP network. Such
gateways typically manage a large number of digital circuits.
•Residential gateways, that provide a traditional analog (RJ11) interface to a Voice over IP network.
Examples of residential gateways include cable modem/cable set-top boxes, xDSL devices,
broad-band wireless devices.
•Business gateways, that provide a traditional digital PBX interface or an integrated soft PBX
interface to a Voice over IP network.