Lifeline telephony provision for voice over digital...
Line break detection device and modem comprising such a device
Line current test device
Line disconnection detection circuit for echo-cancelling transce
Line impedance matching using dynamically generated transfer...
Line loss tester
Line performance test system
Line probe signal and method of use
Line qualification with neural networks
Line sharing multipoint pots splitter controllable line...
Line sharing multipoint POTS splitter masking noise
Line sharing multipoint POTS splitter with intelligent...
Line shunt and ground fault apparatus method
Line tester for coin-operated telephones
Line testing in a telecommunications network
Line testing in a telecommunications network
Line testing in a telecommunications network
Line testing method and apparatus therefor
Line/drop testing from a craft terminal using test unit
Listening device for tracing line continuity and detecting telep