Multiplex communications – Wide area network – Packet switching
Patent
1985-08-02
1987-12-01
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
H04Q 1104
Patent
active
047109165
ABSTRACT:
A burst-switching communications system with integrated voice and data services and with processing capacity sufficient to support T1 or higher link transmission rates, such system including a hub switch located at a point of high-traffic concentration in the network and a plurality of link switches. The switches are interconnected by time-division multiplexed communications links. A burst is a variable-length sequence of bytes which represents, for example, a block of data or a spurt of voice energy as sensed by silence/voice detectors located at voice ports. Within a communications link, a burst is transmitted one byte at a time in an assigned channel of sequential frames of the time-division multiplexed link. The hub switch includes a number of switching units connected in a closed hub ring with one or more time-division multiplexed communication link to another communication link as determined by address information in the burst being received. The bytes of a burst are transferred along the hub ring from the switching unit of the incoming communication link to the switching unit of the outgoing communication link in sequential frames of time-division multiplexed hub channels. Bytes are transferred from switching unit to succeeding switching unit around the hub ring at a rate such as to propagate a byte completely around the hub ring during the time period of a single hub channel.
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Amstutz Stanford R.
Eliscu Mark
Haselton E. Fletcher
Lenart Joseph M.
Chin Wellington
GTE Laboratories Incorporated
Keay David M.
Olms Douglas W.
Romanow Joseph S.
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