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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].

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Ericsson W25 Bedienungsanleitung Seite 13