Multiplex communications – Wide area network – Packet switching
Patent
1986-01-17
1988-02-16
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370100, H04J 308, H04J 306
Patent
active
047260130
ABSTRACT:
A time division multiplex telecommunications system is disclosed as adapted for a key telephone system providing for intercommunication between any two of a series of key telephone sets in cascade connection to a switching control circuit, possibly with facilities for association with the nationwide telephone network. The control circuit receives from the tandem connection of telephones an outgoing data signal of time division multiplex frame format having a succession of frames each comprising a frame sync signal and channels of outgoing data from the respective telephones. Rearranging the channels of data in the received outgoing data signal, the control circuits delivers back to the successive telephones an incoming data signal of similar frame format. Each telephone is equipped for rearrangement of the frame sync signal and data channels of the incoming and outgoing data signals, with the result that all the telephones can be of the same circuit configuration.
REFERENCES:
patent: 3647976 (1972-03-01), Moses
patent: 3751595 (1973-08-01), Moses
patent: 4354054 (1982-10-01), Bellisio
patent: 4631721 (1986-12-01), Ono et al.
Kawashima Masayuki
Omori Hideharu
Iwatsu Electric Co. Ltd.
Marcelo Melvin
Olms Douglas W.
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