Multiplex communications – Wide area network – Packet switching
Patent
1979-12-26
1981-07-21
Olms, D. W.
Multiplex communications
Wide area network
Packet switching
179 18ES, H04Q 1104
Patent
active
042802172
ABSTRACT:
A time division switching system having distributed control processors is disclosed. The distributed processors exchange control messages and cooperate in the completion of talking paths between subscribers. Each control message includes an address portion defining the destination for the control message and is transmitted to a time-shared space division switch on the same time multiplex lines that speech representations are transmitted. Control messages are routed by the time-shared space division switch to a control distribution unit where the address portion is interpreted. When the address portion defines a distributed processor which controls the time-shared space division switch, the control distribution unit transmits the associated control message directly to that processor. Alternatively, when the address portion defines one of the other distributed processors, the control distribution unit transmits the associated control message to the defined processor via the time-shared space division switch. The switching system also includes arrangements for utilizing the control message communication features in the completion of communication paths between subscribers.
REFERENCES:
patent: 3912873 (1975-10-01), Skaperda
patent: 3925620 (1975-12-01), Edstrom et al.
patent: 4007334 (1977-02-01), McDonald
patent: 4074072 (1978-02-01), Christensen et al.
patent: 4186276 (1980-01-01), Schlichte
patent: 4210782 (1980-07-01), Fujita
Hafer Edward H.
Klinger William J.
Bell Telephone Laboratories Incorporated
Olms D. W.
Samples Kenneth H.
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