Multiplex communications – Wide area network – Packet switching
Patent
1979-09-10
1981-11-03
Stewart, David L.
Multiplex communications
Wide area network
Packet switching
370 67, 370 68, 179 18B, 179 18BF, 179 18BC, H04Q 1104, H04M 356
Patent
active
042989779
ABSTRACT:
It is common that communications such as telephone calls between calling and called lines be made by sharing a single communications path on a time division basis. Each call is assigned to a shared path for a short time interval, also called a time slot. It is known to interchange an input time slot to a different output time slot. Unfortunately, known time slot interchange arrangements insert an input sample in a single output time slot. The instant time slot interchanger extends an input sample onto a plurality of output time slots for broadcasting a sample through a plurality of locations. Also, the instant time slot interchanger may selectively insert an alternate message, e.g., an error message, in an output time slot.
REFERENCES:
patent: 3263030 (1966-07-01), Stiefel
patent: 3740483 (1973-06-01), Pederson
patent: 3937898 (1976-02-01), Presto
patent: 3956593 (1976-05-01), Collins
Abbott Robert P.
Chow Ming-Chwan
Cirillo Anthony J.
Drechsler Rudolph C.
Horney, II Lee F.
Bell Telephone Laboratories Incorporated
Roddy Richard J.
Stewart David L.
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