Coin operated telephone auditor

Details Coin operated telephone auditor Coin operated telephone auditor

1998-07-31

2000-04-18

Loomis, Paul

Telephonic communications

With check operated control

Coin signalling or control

379 27, 379155, H04M 1700, H04M 1100

Patent

active

060524537

ABSTRACT:
A low-power, integrated coin acceptor for a payphone containing audit circuitry is described. The integrated coin acceptor connects to the telephone tip, ring and ground lines and connects to a dumb or smart payphone chassis to provide both coin validation and audit functions. The integrated coin acceptor is compatible with the audit software used by the central office, and assures a seamless transition between coin acceptor operation, audit data recording and audit information transmission. Components related to the audit function include a line interface to the tip, ring, and ground lines, a DTMF transceiver, battery backed-up RAM memory, EEPROM memory, real time clock, and battery and control circuits for data retention. During audit interrogation activity, the integrated coin acceptor takes control of the phone line, but contains circuitry that will return dial-tone to the user if an off-hook event occurs. Also disclosed are an interface circuit to aid in initializing the audit functions and for checking the availability of telephone line power, and a cashbox security switch for mounting into an existing hole in the telephone chassis housing.

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