Switching apparatus for burst-switching communications system

Details Switching apparatus for burst-switching communications system Switching apparatus for burst-switching communications system

H - Electricity

04

Q

344/25

H04Q 11/04 (2006.01) H04L 12/64 (2006.01)

Patent

CA 1260586

SWITCHING APPARATUS FOR BURST-SWITCHING COMMUNICATIONS SYSTEM 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 bits 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 communi- cations 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 large number of switching units connected in a closed hub ring with one or more time-division multiplexed communication links connected to each switching unit. The hub switch transfers the bytes of a burst received on any 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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