Multiplex communications – Wide area network – Packet switching
Patent
1978-09-25
1980-06-03
Stewart, David L.
Multiplex communications
Wide area network
Packet switching
370 56, 370 66, 370 84, H04J 316
Patent
active
042063221
ABSTRACT:
A time-division switching system for switching data words from data word sources received in channels of a time-multiplex line where a first plurality of data word sources uses a channel only once every n channels and a second plurality of data word sources uses a channel once every m channels where m is less than n and n is not an integer multiple of m. The switching system operates in response to control words sequentially provided by a control word source. The control word source of the disclosed embodiment comprises a first storage arrangement having n storage locations for storing control words and a second storage arrangement having m storage locations for storing control words. A storage reading circuit substantially simultaneously reads the contents of one storage location of both storage arrangements sequentially. A selection arrangement receives the control words from the storage reading circuit and transmits a predetermined one of the two control words so read to the time-division switching system for control thereof.
REFERENCES:
patent: Re29215 (1977-05-01), Carney
patent: 3924081 (1975-12-01), Rohrig
patent: 3987251 (1976-10-01), Texler
patent: 3988544 (1976-10-01), Texler
patent: 3988545 (1976-10-01), Kummerle
Bell Telephone Laboratories Incorporated
Samples Kenneth H.
Stewart David L.
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