Device for connecting a data processing device to a...

Device for optimizing the circuit switching capacity of a...

Digit parsing for a flexible dial plan capability in a telecommu

Digital line card having universal port for upgrading electronic

Digital loop carrier system with automatic reprovisioning of ded

Digital telephone set having an emergency switching function and

Digital-cross-connect system single element restoration...

Directory number translation in a distributed control switching

Distributed connection control in telecommunication networks

Distributed control exchange

Distributed control type electronic switching system

Distributed network control and fabric application interface

DTMF detection based on LPC coefficients

DTMF signal judging apparatus

DTMF signal judging apparatus

DTMF signal transmission method and communication apparatus

DTMF signal transmission method and communication apparatus

DTMF tone generation in a media gateway

Dual span monitoring system for maintenance shelf control

Dual tone multifrequency signal detection and identification met