Frame transfer device for a fixed format frame transmission netw

Details Frame transfer device for a fixed format frame transmission netw Frame transfer device for a fixed format frame transmission netw

1992-01-27

1993-11-16

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

375114, H04J 306

Patent

active

052630285

ABSTRACT:
A frame transfer mechanism for a processor controlled network node connected to network link wherein fixed-length data frames including a fixed number of slots are to be transferred to and from a memory (10) under processor (23) control. The incoming data flow through a FIFO-IN shift register (22). The outgoing frames flow through a FIFO-OUT (24) register. Both FIFO shift registers are provided with an extra bit position which is used to insert a synchronization-bit (flag) used to control synchronization operation of the system and incoming frames. The extra-bit position is fedback from FIFO-OUT to FIFO-IN to enable wrap-test operation.

REFERENCES:
patent: 4345325 (1982-08-01), Gandini et al.
patent: 4748623 (1988-05-01), Fujimoto
patent: 4974225 (1990-11-01), Chenier et al.

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