Multiplex communications – Wide area network – Packet switching
Patent
1991-08-12
1992-08-11
Shaw, Gareth D.
Multiplex communications
Wide area network
Packet switching
370 601, 370 943, 34082552, H04L 1244
Patent
active
051386119
ABSTRACT:
A computer interconnect coupler has channel transmitters and channel receivers and logic circuitry for the routing of messages from the channel receivers which are addressed to the channel transmitters. When a message is received by a channel receiver, the channel receiver stores the beginning portion of the message in a first-in-first-out buffer, and sends a route message request to central switch logic. If the destination transmitter or receiver is busy, the central logic places the message request on a destination queue and returns a signal to the requesting source transmitter to turn on a flow control signal which is transmitted back to the data processing device having originated the message. Any message addressed to this data processing device, however, is inserted into the flow control carrier with pauses both before and after the message, and provisions are also made to allow the data processing device to return an acknowledgment responsive to the incoming message. To permit incremental expansion of the coupler to accommodate an increased number of channels, additional channel interface boards may be added. The coupler also includes a plurality of timers which determine fault conditions, and a diagnostic processor monitors the timers and associated error flags to diagnose faults to the board level. The conditions existing at the time of fault diagnosis are written into a non-volatile memory located on the circuit board. Therefore, the information is physically carried along with the board to the repair facility.
REFERENCES:
patent: 3133154 (1969-10-01), van Bosse
patent: 3979733 (1976-09-01), Fraser
patent: 4032899 (1977-06-01), Jenny et al.
patent: 4058672 (1977-11-01), Crager et al.
patent: 4079207 (1978-03-01), Veda et al.
patent: 4079209 (1978-03-01), Schwerdtel
patent: 4081612 (1978-03-01), Hafner
patent: 4232366 (1978-11-01), Levy et al.
patent: 4320500 (1982-03-01), Barberis et al.
patent: 4347498 (1982-08-01), Lee et al.
patent: 4366537 (1982-12-01), Heller et al.
patent: 4380063 (1983-04-01), Janson et al.
patent: 4449182 (1984-05-01), Rubinson et al.
patent: 4450572 (1984-05-01), Stewart et al.
patent: 4456957 (1984-06-01), Schieltz
patent: 4470114 (1984-09-01), Gerhold
patent: 4475192 (1984-10-01), Fernow et al.
patent: 4484030 (1984-11-01), Gavrilovich
patent: 4490785 (1984-12-01), Strecker et al.
patent: 4499576 (1985-02-01), Fraser
patent: 4511958 (1985-04-01), Funk
patent: 4530090 (1985-07-01), Priamo et al.
patent: 4539676 (1985-09-01), Lucas
patent: 4542497 (1985-09-01), Huang et al.
patent: 4543626 (1985-09-01), Bean et al.
patent: 4556972 (1985-12-01), Chan et al.
patent: 4560985 (1985-12-01), Strecker et al.
patent: 4574284 (1986-03-01), Feldman et al.
patent: 4577308 (1986-03-01), Larson et al.
patent: 4592072 (1986-05-01), Stewart
patent: 4603416 (1986-06-01), Servel et al.
patent: 4615028 (1986-09-01), Lewis et al.
patent: 4616359 (1986-10-01), Fontenot
patent: 4623996 (1986-11-01), McMillen
patent: 4627052 (1986-12-01), Hoare et al.
patent: 4630254 (1986-12-01), Tseng
patent: 4630258 (1986-12-01), McMillen et al.
patent: 4630259 (1986-12-01), Larson et al.
patent: 4630260 (1986-12-01), Toy et al.
patent: 4633245 (1986-12-01), Blount et al.
patent: 4638475 (1987-01-01), Koike
patent: 4639910 (1987-01-01), Toegel et al.
patent: 4644532 (1987-02-01), George et al.
patent: 4653085 (1987-03-01), Chan et al.
patent: 4654654 (1987-03-01), Butler et al.
patent: 4656622 (1987-04-01), Lea
patent: 4661947 (1987-04-01), Lea et al.
patent: 4663706 (1987-05-01), Allen et al.
patent: 4672604 (1987-06-01), Bhatia et al.
patent: 4679186 (1987-07-01), Lea
patent: 4692917 (1987-09-01), Fujioka
patent: 4696000 (1987-09-01), Payne, III
patent: 4704717 (1987-10-01), King, Jr.
patent: 4706150 (1987-11-01), Lebizay et al.
patent: 4710769 (1987-12-01), Friedman et al.
patent: 4714922 (1987-12-01), Cripps et al.
patent: 4719459 (1988-01-01), Kovacs et al.
patent: 4742482 (1988-05-01), Inskeep et al.
patent: 4750109 (1988-06-01), Kita
patent: 4752777 (1988-06-01), Franaszek
patent: 4783657 (1988-11-01), Bouchard et al.
patent: 4789980 (1988-12-01), Darcie et al.
patent: 4797881 (1989-01-01), Ben-Artzi
patent: 4809362 (1989-02-01), Claus et al.
patent: 4875208 (1989-10-01), Furuhashi et al.
patent: 4881263 (1989-11-01), Herbison et al.
patent: 4884263 (1989-11-01), Suzuki
patent: 4901309 (1990-02-01), Turner
P. Chilton et al., "MEUNET--A High Performance, High Availability Packet Switch", FTCS 14, The Fourteenth International Conference on Fault-Tolerant Computing, IEEE, pp. 164-169 (Jun. 1984).
Carn Ronald C.
Henry Barry A.
Kaczor Charles E.
Kent Allan R.
Kirk Robert C.
Digital Equipment Corporation
Fagan Matthew C.
Shaw Gareth D.
LandOfFree
Blocking message transmission or signaling error in response to does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blocking message transmission or signaling error in response to , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blocking message transmission or signaling error in response to will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-352394