Ultra-slim telephone set
Ultrasonic proximity detector for a telephone device
Ultrasonic radiotelephone for an automobile
Ultrasonically-calibrated fast-start echo canceller for...
Unattended meet-me-conference controlled by a telephone terminal
Unauthorized call activity detection and prevention systems...
Unauthorized call defeat apparatus
Unbalanced ringing using a balanced ringing generator of a subsc
Unbalanced slic with a built-in ring circuit
Unbundling device and method for connecting a competing...
Undetected provision of auxiliary services during a...
Unidirectional ear microphone and gasket
Unidirectional ear microphone and method
Unified communication services via e-mail
Unified communications automated personal name addressing
Unified directory for caller ID and electronic mail addresses
Unified message system for accessing voice mail via email
Unified messaging architecture
Unified messaging system
Unified messaging system