Craft menu system using caller ID functionality for...
Data terminal for telephone circuits
Digital signal processor-based telephone test set analyzing...
Display-based control mechanism resident in portable test and co
Hand-held telephone line signaling test instrument
Handset identifier using support vector machines
Inductive amplifier having automatic gain control for butt set
Inductive amplifier having comb filter
Jack and test plug
Keypad/dialler interface for telephone test set
Line tester for coin-operated telephones
Listening device for tracing line continuity and detecting telep
Maintenance terminal of a validation and identification unit
Maintenance unit for modular public telephone
Method and apparatus as for testing a telephone line interface c
Method and means for remote testing of unused telephone lines
Method and system for testing a connection in a telephone networ
Methods and test sets for testing multi-line...
Methods and test sets for testing multi-line...
Modular test instrument