scope:

This Recommendation defines the protocols used between elements of a physically decomposed multimedia gateway. There are no functional differences from a system view between a decomposed gateway, with distributed sub-components potentially on more than one physical device, and a monolithic gateway such as described in [ITU-T H.246]. This Recommendation does not define how gateways, multipoint control units or interactive voice response (IVR) units work. Instead it creates a general framework that is suitable for these applications.

Packet network interfaces may include IP, ATM or possibly others. The interfaces will support a variety of switched circuit network (SCN) signalling systems, including tone signalling, ISDN, ISUP, QSIG and GSM. National variants of these signalling systems will be supported where applicable.

Products claiming compliance with Version 1 of Recommendation ITU-T H.248.1 shall comply with all of the mandatory requirements of Recommendation ITU-T H.248.1 originally approved in 06/2000 and reissued in 03/2002.

Products claiming compliance with Version 2 of Recommendation ITU-T H.248.1 shall comply with all of the mandatory requirements of Recommendation ITU-T H.248.1 originally approved in 05/2002 and updated in 03/2004.

Products claiming compliance with this Recommendation shall comply with all of the mandatory requirements of Recommendation ITU-T H.248.1 approved in 03/2013.

Products shall indicate the version of the protocol in use by using ServiceChangeVersion as '1' to refer to Recommendation ITU-T H.248.1 (03/2002), '2' to refer to Recommendation ITU-T H.248.1 including its Corrigendum 1 (03/2004), and '3' to refer to Recommendation ITU-T H.248.1 (09/2005 and 03/2013).