Timer associated with CB relay

Details Timer associated with CB relay Timer associated with CB relay

1975-03-05

1976-12-21

Cooper, William C.

H04Q 320

Patent

active

039990184

ABSTRACT:
A circuit for detecting a true seizure condition of a trunk calling bridge relay employs a timer which is incremented every 40 milliseconds as long as a continuous trunk off-hook representative signal is supplied thereto for approximately 300 milliseconds. For momentary changes in the condition of the trunk CB relay the timer will be incremented and decremented so as to effectively filter out momentary trunk calling bridge seizure changes.

REFERENCES:
patent: 3622709 (1971-11-01), Tjaden
patent: 3716674 (1973-02-01), Manos
patent: 3781483 (1973-12-01), Deisch

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