Ultra-wide band wireless/power-line communication system for...
Ultrasonic proximity detector for a telephone device
Unattended meet-me-conference controlled by a telephone...
Unauthorized call defeat apparatus
Unified alerting method and apparatus
Unified directory for caller id and electronic mail addresses
Unified messaging system and method
Unified work station controller and method
Unique ringing on a prime telephone line
Universal authentication device for use over telephone lines
Universal authentication device for use over telephone lines
Universal call access with reverse billing
Universal compatibility software system for services in...
Universal connection point for resources and communication
Universal dictation input apparatus and method
Universal directory service
Universal directory service
Universal isdn subscriber line module
Universal linking gateway between telephonic devices
Universal message delivery system