Abbreviated dialing between PBX and Centrex systems using a...
Call-routing method for a virtual private network as well as ser
Communication method between processors in a decentralized multi
Communication system and method for controlling features in...
Communication system consisting of at least two private...
Communication system consisting of at least two private...
Communication system of at least two private branch exchanges ha
Computer system using identification information and control...
Computer telephony (CT) network serving multiple telephone...
Cost-conscious telecommunications terminal
Devices, systems, and methods for migration scheduling
DNIC peripheral extender
Exchange and an exchange system in a communication network
Fully integrated telecommunication network
LAN phone system with automatic fallback for power or...
Method and system for controlling outside incoming call...
Method for supporting the mobility of a subscriber across a...
Method for switching telephone calls between two telephone...
Method of adding a new PBX and new PBX port to an existing PBX n
Method of and apparatus for networking a plurality of private br