Constant current line circuit
Constant power telephone line circuit
Cordless phone with time-out controlled ringer
Cordless telephone outlet device
Cover for a remote terminal
Current limited subscriber interface circuit
Current limiting battery feed arrangement
Current supply circuit
Data transmitter-receiver having echo canceler with data delay
DC-supply arrangement for a telecommunication line
Device and method for connecting a monitored alarm system to...
Device for processing echo, particularly acoustic echo in a tele
Dialer circuit
Digital direct current feed control for a communication system
Digital echo canceller comprising a double-talk detector
Digital subscriber line modem utilizing echo cancellation to...
Digital switching system with shared analog line
Digital switching system with shared analog line
Direct current feed with line status change adaptation in a comm
DOCSIS network interface device and methods and systems for...