Uniform control of mixed platforms in telephony

Universal DC signalling detector

Universal PBX interface

Universal PBX interface

Use-code based call-treatment selection

User interaction procedure

Using remote processors to generate routing information to...

Virtual end office in a switched telephone network

Virtual inter-machine trunking feature for communication network

Virtual private communications network

Virtual private line connection system and method

Virtual private network connecting system

Virtual private network system and method using voice over...

Virtual signaling network method

Virtual telephone extension

Virtual terminal control device for switching system

Virtual wide area centrex

Virtual work environment for remote users

VoIP adapter, IP network device and method for performing...

VoIP call routing