Telephone call duration control

Telephone call forwarding device

Telephone call screening apparatus

Telephone call screening apparatus

Telephone call screening circuit

Telephone dialing system for specialized services

Telephone for inhibiting specific calls dialed by an audible ton

Telephone fraud detection and prevention

Telephone fraud detection system

Telephone intercept apparatus and method for intercepting an...

Telephone line access control

Telephone line security system

Telephone lock unit

Telephone number parser for wireless local loop telephones

Telephone privacy device

Telephone privacy protector

Telephone ring registering device

Telephone service protection device

Telephone set having outbound call restriction logic circuit

Telephone system