Multiplex communications – Wide area network – Packet switching
Patent
1995-02-01
1995-10-03
Ray, Gopal C.
Multiplex communications
Wide area network
Packet switching
370 601, 370 941, 340826, 3642419, 364260, 3642601, 3642222, 364284, 3642844, 364DIG1, 395823, 395311, G06F 1314, H04Q 1104
Patent
active
054559170
ABSTRACT:
A data communication system embodying an apparatus and a method provides simultaneous paths between a plurality of transmit ports and a plurality of receive ports for transmitting therebetween data identifying their destination receive ports. Such data are signals which are constructed in accordance with a standard serial protocol for frame element communication, such as HDLC (High-level Data Link Control). The system is assembled in a chassis containing a backplane and multiple cards having transmit and receive ports through which the cards couple the backplane. The system includes: a receiver of data transmitted by a source transmit port, a recognizer of the destination receive port identified by the received data, a determiner of the availability of the recognized destination receive port, a connector of a path between the source transmit port and the destination receive port in response to a determination that the recognized destination receive port is available, and a transmitter of the received data to the destination receive port through the connected path.
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Boyd Jeffrey A.
Heron David T.
Holeman James E.
Morrison Gary R.
Teisberg Robert R.
Ray Gopal C.
Tandem Computers Incorporated
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