Protection circuit/method for subscriber telephone interface...
Protection device for terminal equipment on telephone subscriber
Protection of active telephone line interface circuits
Protective plug for distribution frame devices in...
Protector device
Protector interface
Protector module for quick clip terminal telephone connector blo
Quasi ground fault interruption signal-based activation of...
Recovery of previous filter coefficients with smaller capacity m
Reduced contact resistance on a SLIC
Reduction of signal processing requirements in a 2B1Q-code echo
Remote power feed method and system
Remote terminal channel unit for telephone transmission lines
Remote terminal unit connector
Resetting surge protection in telephone line interface circuits
Resistive feed rail generation in a power supply
Resistive line feed circuit
Retrofit interface apparatus and method for remote isolation dev
Retrofit network interface apparatus
Retrofit telephone network interface apparatus