Summary

ITU-T Rec. H.246 describes gateways which provide protocol interworking between H-Series multimedia terminals and other H-Series multimedia terminals, voice/voiceband terminals on GSTN or ISDN, V.70 terminals on the GSTN, and multi-call applications on the GSTN. H.246 gateways provide the required translation of control and media streams to allow interworking between terminals running different protocols.

This Amendment 1 revises Annex A/H.246 (H.323-H.320 interworking) and introduces some editorial changes in the main body of the Recommendation. It introduces a number of enhancements and clarifications to the previous version, primarily the description on the usage of H.243 multipoint control messages and Unicode characters in H.32x systems.