Communication filter

Details Communication filter Communication filter

1987-07-15

1989-05-30

Atkinson, Charles E.

Excavating

371 14, 371 57, G06F 1110

Patent

active

048357766

ABSTRACT:
Method and apparatus is disclosed which disables which disables a repeater connected to a packet-based network so that improper symbols are not propagated. A communications management unit employing the invention would, upon reception of an improper symbol, cause transmission to halt. The invention implements a three-state machine. Reception of any improper symbol, or symbol with a parity error, causes entry into a forced-halt state. Reception of an IDLE symbol causes transition to a forced-idle state. Return to the start state occurs upon reception of a start-of-packet symbol pair.

REFERENCES:
patent: 4208650 (1980-06-01), Horn
patent: 4692894 (1987-09-01), Bemis
patent: 4700358 (1987-10-01), Duncanson et al.
patent: 4703486 (1987-10-01), Bemis

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