A.2 Summary

29.3323GPPMedia Gateway Control Function (MGCF) - IM Media GatewayMn interfaceRelease 17TS

This Profile describes the minimum mandatory settings and procedures required to fulfil the Media Gateway control requirements for a) the interworking scenario between 3GPP IMS and 3GPP CS or PSTN/ISDN and b) the interworking scenario between NGN and PSTN/ISDN (i.e ETSI IMS-PSTN/ISDN, ETSI PES-PSTN/ISDN).

In addition optional settings and procedures are described which fulfil optional features and where supported, the minimum mandatory settings within the optional procedures and packages are identified that must be supported in order to support that feature.

"Optional" or "O" means that it is optional for either the sender or the receiver to implement an element. If the receiving entity receives an optional element that it has not implemented it should send an Error Code (e.g. 445 "Unsupported or Unknown Property", 501"Not Implemented", etc.). "Mandatory" or "M" means that it is mandatory for the receiver to implement an element. Whether it is mandatory for the sender to implement depends on specific functions; detail of whether elements of the core protocol are manadatory to be sent are defined in the stage 2 procedures, stage 3 procedures and/or the descriptions of individual packages.

The setting or modification of elements described in the profile under the heading "Used in Command" has the meaning that the property can be set/modified with that command. The property may be present in other commands (in order to preserve its value in accordance with ITU-T H.248.1[9]) when those commands are used for other procedures that affect the same descriptor.

This profile supports Explicit Congestion Notification, Multimedia Priority Service and Rate Adaptation for Media Endpoints using Enhanced Bandwidth Negotiation.