Programmable computerized telephone call cost metering device

A programmable computerized telephone call cost metering device comprising:

• (a) a keyboard input device for entering data, and commands;
• (b) an output device for displaying data, and information;
• (c) means for interfacing said programmable computerized telephone cost metering device with a telephone for automatically sensing when a called party responds to and terminates a call;
• (d) means for erasably programing said programmable computerized telephone call cost metering device with a complete rate schedule of telephone costs for an entire area;
• (e) means associated with said keyboard input device for selectively and changeably entering specific service type and exchange information of the telephone being interfaced to identify the particular combination of rates from the rate schedule to be used for the telephone, and
• (f) means associated with said keyboard input device for selectively and changeably entering an access security code for protecting input and programmed information from being altered by anyone not entering the selected access security code, whereby the cost of a multiplicity of telephone calls with various rates made on said telephone will be displayed on said output device, when the exchange and any area code of a called number is inputted on said keyboard input device, and the total cost of a call will be displayed during the duration of a call.