Telephone set of distinctive ringing type capable of generating

Telephone set of distinctive ringing type wherein pattern of tel

Telephone set with on-hook line seizure

Telephone set with subscriber listing

Telephone signal detecting circuit

Telephone signal discriminator

Telephone silencing system

Telephone station equipment employing rewriteable display keys

Telephone station equipment employing rewriteable display keys

Telephone subscriber circuit with galvanic isolation

Telephone subscriber line voltage change detection

Telephone subscribers' circuits

Telephone subset arrangement

Telephone system

Telephone system for making call to telephone number read...

Telephone system having a dial data changeover switch

Telephone system with several terminals on a single line

Telephone terminal

Telephone terminal apparatus and method

Telephone terminal capable of effectively making use of a...