1/221 02-FGB 101 327 Uen A – December 2006 13
• Supports addressing and routing of multimedia sessions to and
from CSCFs and interconnected PSTN nodes.
• Controls one or more Media Gateways using the H.248 protocol.
• Performs mapping of application level signaling (SIP/ISUP).
• Sends Radius request to the Multi Mediation system.
See the MGC documentation in reference [2] for more information.
5.1.2.2 Media Gateway (MGW)
The Media Gateway (MGW) provides interworking between PSTN and SIP
media streams, i.e. conversion between circuit-switched TDM (Time
Division Multiplexing) bearer circuits and packet-switched media streams
(RTP). It is controlled by the MGC using H.248.
The Media Gateway functionality is provided by the AXD 301, which is
described in reference [2].
