Token ring wiring concentrator

Details Token ring wiring concentrator Token ring wiring concentrator

1991-02-27

1993-03-30

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 855, H04Q 1100

Patent

active

051990261

ABSTRACT:
In a token ring network wiring concentrator providing a low current/low voltage DC control signal to control insertion and removal of a work station, an improved concentrator lobe having a latching relay with a closed position in which communication is provided between a token ring network and a work station and an open position in which such communication is severed, an insertion relay driver circuit responsive to the DC control signal to close the latching relay when the DC control signal reaches a preselected minimum level, a removal relay driver circuit responsive to the DC control signal for opening the latching relay when the DC control signal falls below a preselected level and an insertion indicator LED for indicating when the work station is connected to the token ring network.

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Local Area Networks: Token Ring Access Method, ANSI/EEE, Std802.5-1985, "Station Attachment Specifications-Shielded Twisted Pair," pp. 77-81, appendix C1-C4.

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