Multiplex communications – Wide area network – Packet switching
Patent
1982-06-14
1984-06-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 85, H04J 312
Patent
active
044556470
ABSTRACT:
A digital data telecommunications system comprises a central switching system and a plurality of line terminators each connecting the switching system to a pair of incoming and outgoing lines and each designed to convert serial data transmitted along the incoming and outgoing lines into formatted message characters for transfer through the switching system, and vice-versa. Control data stored in a connection memory for the duration of a call enable the switching system to interconnect sequentially each calling line terminator with the respective called line terminator in a time multiplex mode for transmitting one message character at a time. An arrangement for establishing multi-address connections includes an additional line terminator connected to receive a character of a multi-address message from a calling line terminator across the switching system. A distributing data bus connects this line terminator in parallel to all line terminators entitled to receive a multi-address message. These receiving line terminators include control means for alternatively enabling the respective line terminator in a single address mode to receive a message character supplied by the switching system, and in a multi-address mode to receive serial data transmitted along said distributing data bus, respectively.
REFERENCES:
patent: 4150259 (1979-04-01), Fenton et al.
patent: 4203001 (1980-05-01), Condon
patent: 4330886 (1982-05-01), Fukuda
patent: 4340775 (1982-07-01), Gesek et al.
patent: 4373183 (1983-02-01), Means et al.
Milde Jr. Karl F.
Olms Douglas W.
Rodau Andrew G.
Scutch III Frank M.
Siemens Corporation
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