Communication system distributed processing message delivery sys

Communication system supporting remote operations

Communications network routing and management system

Communications switch permitting transparent maintenance of swit

Communications system and interface circuit for interconnecting

Control data transmission system for private branch exchange

Controlling multi-fort hunt groups in a distributed control swit

Controlling multi-port hunt groups in a distributed control swit

Convertible switched telephone exchange

Cross point mixer for a telephone set

Cross point switch with power failure mode

Cross-connect switch

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