Distributed architecture for IP-based telemetry services

Distributed control teleconferencing voice bridge

Distributed splitter for data transmission over twisted wire...

Distributed splitter for data transmission over twisted wire...

Document distribution system

Document transmission method upon generation of an error during

Door ajar signalling device

Download booster for ADSL transmission

DSL communication system with improved bandwidth

DSL compatible load coil

DSL integrated call waiting

DSL modem with management capability

DSL-ready pots device and method

DTMF download technique for digital telephone devices

DTMF transmission and displaying method for facsimile system

Dual connection mode equipped communication control apparatus

Dual IP phone and method of telecommunicating by using the same

Dual mode phone line interface

Dual-band modem and service

Dual-circuit telephony