IPC Definitions - January 01, 2012
H04M 7/00 - Definition
This main group covers:
Interconnection arrangements between switching centres;
Internet telephony and traditional circuit-switched telephony requiring interworking between the two (see in this respect also ITU-T Recommendation Y.2261, "PSTN/ISDN evolution to NGN").
References relevant to classification in this main group
This main group does not cover:
Transmission arrangements in general | H04B |