Off-hook telephone clearing system

Details Off-hook telephone clearing system Off-hook telephone clearing system

1996-03-15

1998-06-09

Matar, Ahmad F.

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379418, 379393, H04M 100

Patent

active

057647526

ABSTRACT:
An off-hook telephone clearing system for a telephone line having at least two telephones connected thereto, comprising a howler tone detector connected to each telephone, and a telephone disconnect device having an input responsive to the howler tone detector for disconnecting a telephone being in off-hook condition from the telephone line. The clearing system may include a latching relay in the disconnect device. The latching relay may be mechanically coupled to the telephone hookswitch for delatching upon hang-up of the receiver.

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