Data communication system having means for switching between mai

Details Data communication system having means for switching between mai Data communication system having means for switching between mai

1988-08-30

1989-05-16

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

370 13, H04J 116, H04J 314

Patent

active

048316172

ABSTRACT:
A data communication system in which a pair of communication offices are provided in a 1:1 correspondence, each communication office including duplex constructed transmission-reception apparatuses, and a switching control unit for switching between the duplex constructed transmission-reception apparatuses in response an event to be switched the apparatuses, generated in an own communication office, and a change of the switching status in another communication office to match the switching status in the switching status the other in communication office so that a communication channel is established. The switching control units in the communication offices operate independently, but are provided with functions to prevent an endless mismatching of the switching between the communication offices, in a short time and by a simple procedure.

REFERENCES:
patent: 3457373 (1969-07-01), Duuren et al.
patent: 4412323 (1983-10-01), Abbott et al.
patent: 4680750 (1987-07-01), Davidow

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