Signaling device and system
Silent ringing with reduced device sizes
Single transformer hybrid system and method
Single-ended loop test circuitry in a central office DSL modem
Solid state isolation device using opto-isolators
Solid state primary telephone protector
Solid state telephone protector module
Solid state telephone protector module
Speech amplifier-resident mechanism for controllably...
Speech recognition method and system with improved voice-activat
Splitter assembly for a telecommunications system
Splitter assembly with high density backplane board
Splitter device for MDU/MTU environments
Splitter wall plates for digital subscriber line (DSL)...
Splitting of a supply current drawn from a telecommunication sys
Standby high voltage analog line feed
Startup procedure for international line powered DAA
Station interface and protector apparatus
Station interface and protector with built in redundancy
Station line interface circuit for a telecommunication network