Multiplex communications – Wide area network – Packet switching
Patent
1988-01-29
1990-03-13
Yusko, Donald J.
Multiplex communications
Wide area network
Packet switching
455606, 3408255, 3408252, 34082503, 370 91, 375 8, H04Q 1104
Patent
active
049088238
ABSTRACT:
There is disclosed a data communications link adapter providing flow of data control and status information between an input/output (I/O) Backplane and a fiber optic Frontplane. The adapter represents a melding of I/O channel extender technology and data communications technology: a dedicated processor handles link layer protocol, leaving to software only higher protocol layers; a flow-through architecture is provided by the adapter; a combination of windowing and handshaking are used; and a relatively short frame of sixteen bytes is employed. The adapter includes a backplane adapter portion which serves to interconnect host equipment, a processor portion dedicated to layer 3 (circuit operations), a protocol controller dedicated to layer 2 (physical layer) operations, a fiber optic interface portion dedicated to layer 1 (physical link) operations, and an arbiter portion which couples the processor to a data path connecting the backplane adapter and the protocol controller. The arbiter controls data accesses that use a portion of the data path connecting the backplane adapter to the protocol controller and a data path between the protocol controller and the processor. A variety of data integrity measures are implemented on all data paths. The adapter facilitates data flow-through by buffering internal to the protocol controller, and has extensive data flow control features.
REFERENCES:
patent: 3937882 (1976-02-01), Bingham
patent: 4677614 (1987-06-01), Circo
patent: 4715045 (1987-12-01), Lewis et al.
patent: 4730308 (1988-03-01), Friedman et al.
patent: 4734908 (1988-03-01), Hedlund
patent: 4748656 (1988-05-01), Gibbs et al.
patent: 4761735 (1988-08-01), Amy
Haagens Randolph B.
Keaveny Thomas A.
Hewlett--Packard Company
Pudpud E. O.
Yusko Donald J.
LandOfFree
Hybrid communications link adapter incorporating input/output an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hybrid communications link adapter incorporating input/output an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid communications link adapter incorporating input/output an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-55984