Local loop test arrangement in an echo canceller based full dupl
Local/remote modification of electronically alterable operating
Localization of customer premises in a local loop based on...
Lockout device for preventing telephone eavesdropping from an ex
Long-distance transmission system and device
Loop certification and measurement for ADSL
Loop certification and measurement for ADSL
Loop detection signal issuing circuit in subscriber circuit havi
Loop integrity test device and method for digital subscriber...
Loop loss measurement and reporting mechanism for digital...
Loop loss measurement and reporting mechanism for digital...
Loop status verification system
Loop status verification system
Loop test apparatus and method
Loop-back test system using a suppressed ringing connection
Low power control apparatus for a coin operated telephone