Fraud prevention in an electronic coin telephone set

Fraud prevention system and method

Intelligent public telephone system and method

Intelligent vending system and method

Method and apparatus for detecting and announcing pin fraud on c

Method and apparatus for electronic payphone open switch interva

Method and apparatus for preventing pay telephone fraud and redu

Method and apparatus for preventing pin fraud on coin telephones

Method and apparatus for preventing return dial tone fraud in a

Method and apparatus for providing fraud detection using hot...

Method of preventing fraudulent toll calls by key system users

Motion detection for preventing removal of a fixed wireless term

Pay telephone stand

Pay telephone vault guard

Payphone electronic coin validator

Paystation monitor circuit to prevent fraudulent use

Paystation theft inhibiting circuit

Paystation transmitter ground detect circuitry

Pin fraud and shock prevention system

Prepayment product or service dispenser