Multiplex communications – Wide area network – Packet switching
Patent
1986-06-20
1988-03-15
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 85, 370 94, H04Q 1104, H04J 302, H04J 324
Patent
active
047317850
ABSTRACT:
Apparatus for and a method of inserting circuit switch information and packetized data into different time slots of a time division multiplexed bus. A memory having a location individual to each time slot is written with information specifying whether the time slot individual to each location is to serve circuit switch information or packet data. The readout of each memory location during the occurrence of it's associated time slot controllably effects the application of either the circuit switch information or the packet data to the bus. Packet data can be inserted into each time slot not currently being used by the circuit switch. A special information bit is inserted into each time slot to specify whether the remainder of the bits of the time slot represents circuit switch or packet information. The information bit is used by receiving apparatus to steer the bits of each time slot to either a receiving circuit switch or a receiving packet switch.
REFERENCES:
patent: 3988545 (1976-10-01), Kuemmerle et al.
patent: 4154983 (1979-05-01), Pedersen
patent: 4535448 (1985-08-01), Baxter et al.
patent: 4539676 (1985-09-01), Lucas
patent: 4569041 (1986-02-01), Takeuchi et al.
Ferenc James J.
Gebhardt Robert W.
Grimes Gary J.
Morgan, Jr. Edward B.
Sellers, III Gabe A.
American Telephone and Telegraph Company
AT&T Information Systems Inc.
Duft Donald M.
Olms Douglas W.
Scutch III Frank M.
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