Dialing control method

Digit parsing for a flexible dial plan capability in a telecommu

Digital clocking synchronizing mechanism

Digital line card having universal port for upgrading electronic

Digital loop carrier system with automatic reprovisioning of ded

Digital signal cross-connect panel

Digital system connect frame

Digital system connect frame

Digital telephone set having an emergency switching function and

Digital tone detector

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

Direct customer control of a network router

Directing contacts between an end user and a contact center...

Directing contacts between an end user and a contact center...

Directly contactable call center agents

Directory number translation in a distributed control switching

Distributed call progress tone detection system and method...

Distributed call-routing systems

Distributed connection control in telecommunication networks

Distributed control exchange