Telecommunication alarm method and system
Telecommunication customer interface
Telecommunication system tester with integrated voice and data
Telephone line quality testing system
Telephone operator simulator
Telephone security violation detection device
Telephony Test Technique
Testing of subscriber lines in a digital switch
Testing system for digital transmission lines
Testing within communication systems using an arq protocol
Transmit power control for DSL modems in splitterless...
Two-wire channel unit with loopback test capability