Operating a network node

Method and system for managing internal and external calls for a group of communication clients sharing a common customer identifier

Remote redundant voice server system

System and method for selectively coupling various communication devices through common channel

Method for dial plan parsing and a system incorporating the same

Method and system of providing on-network communication services

Method and system for processing telephone calls via a remote tie-line

Method for implementing wide area Centrex

Method and apparatus for providing called party information to a coverage point during survivable processor operation

Method and apparatus for ubiquitous access to dialing plans for enterprise networks

Telecommunications facility, group of telecommunication facilities, method of configuring and operating such group and software for identifying a client and a facility therein

Method of operating and configuring a telecommunication system; dispatcher software for identifying a client therein and telecommunication apparatus containing same

Method for operating a voice terminal connected to a remote private automatic branch exchange, communication arrangement and voice terminal