DUAL TIMING CIRCUIT FOR TELEPHONE SUBSCRIBER'S INSTRUMENT

摘要

DUAL TIMING CIRCUIT FOR TELEPHONE SUBSCRIBER'S INSTRUMENT A dual timing circuit for use with a subscriber's telephone circuit operated in response to two manual switch operations to simulate the placement of the subscriber's phone in the "on-hook" condition for two different predetermined periods of time. One "on-hook" period being for the operation of transfer circuitry in an asssociated PABX and the other period being for the initiation of a new call.