Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1996-11-27
1999-11-16
Pham, Chi H.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
370537, H04J 312
Patent
active
059870397
ABSTRACT:
A multiplexing system for ISDN circuits. Multiplexers in the system include data terminals, voice interfaces having voice trunks, high speed digital circuits and ISDN circuits, together with a control channel interface which connects trunking circuits by controlling calls on the control channel. When an outgoing voice call originates, data information from data terminals voice is multiplexed with compressed information from a voice interface and transmitted to trunking circuits. When calls originate, the control channel controls calls and connects them with trunking circuits. When using ISDN circuits, after setting up a communication channel for the circuits, a CPU controls calls to multiplex ISDN circuits on the control channel. By this structure decreasing the multiplexing ratio due to voice multiplexing call control on ISDN circuits can be eliminated when linking multiplexers with communication channels having high speed digital circuits and ISDN circuits.
REFERENCES:
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patent: 5067125 (1991-11-01), Tsuchida
patent: 5210740 (1993-05-01), Anzai et al.
patent: 5442622 (1995-08-01), Hokari
patent: 5446732 (1995-08-01), Miyamoto
Wada Yasuo
Watanabe Toshikatsu
Hitachi Telecom Technologies Ltd.
Nguyen Kim T.
Pham Chi H.
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