Abstract: A concentrator for a token ring network utilizes latching relays having separate set and reset coils for controlling the insertion/bypass of the ports into the token ring network. Circuitry for providing a global reset capability for all of the ports includes transistors which function to both provide a path for the global reset pulse to the reset coils and to isolate each reset coil in a port from the reset coils of the other ports. Other circuitry is provided for preventing activation of the global reset function from affecting an active port.
Type:
Grant
Filed:
December 18, 1990
Date of Patent:
July 21, 1992
Assignee:
AMP Incorporated
Inventors:
Bret A. Matz, K. C. Babu, Geeta George, Hemant K. R. Kumar, Soma Rakshit, S. Krishnakumar Rao