Multiplex communications – Wide area network – Packet switching
Patent
1987-11-13
1989-02-28
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
H04J 312
Patent
active
048092711
ABSTRACT:
A system in which two stations are respectively provided with telephones and data terminals such that a voice and data are multiplexed for communication between the two stations. Each station has a circuit to convert voice signals inputted from the telephone into a plurality of kinds of predetermined voice parameters, a circuit to determine a transmission mode depending on a predetermined parameter of the voice signals, a circuit to extract data having a length corresponding to the transmission mode from data to be transmitted from the data terminal, a circuit to select one of the plurality of voice parameters depending on the transmission mode, and a unit to edit a mode indicator indicating the transmission mode, the selected voice parameter, and the extracted data into a transmission block format corresponding to the transmission mode. The transmission block includes only voice information containing all voice parameters in the first mode; voice information and data information in the second mode, and voice information containing the minimum voice parameters and data information in the third mode.
REFERENCES:
patent: 4476559 (1984-10-01), Brolin et al.
patent: 4479213 (1984-10-01), Galand et al.
patent: 4528659 (1985-07-01), Jones, Jr.
Takanori Miyamoto, Kazuhiro Kondo, Toshiro Suzuki, Yoshiaki Asakawa, Akira Ichikawa; Proceedings of IEEE-IECEJ-ASJ International Conference on Acoustics, Speech, and Signal Proceedings; Apr. 7-11, 1987; pp. 1717-1720.
Kondo Kazuhiro
Miyamoto Takanori
Suzuki Toshiro
Hitachi , Ltd.
Olms Douglas W.
Scutch III Frank M.
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