Twisted pair communication system
Two-line telephone controller
Two-line telephone controller with hold feature
Two-tiered authorization and authentication for a cable data...
Two-way communication over a single transmission line...
Two-way voice & digital data analyzer for telephones
Unified messaging system and method
Unified messaging system and method
Unified system for exchanging data between a terminal and access
Unit for the bidirectional detection and transmission of...
Universal authentication device for use over telephone lines
Universal authentication device for use over telephone lines
Universal modem receiver transmitter
Universal point of contact identifier system calling device...
Universal remote control system
Universal Serial Bus datapump command interpreter
Universal wedge-type telephone adaptor for computer system
Use of telecommunications systems for lotteries
User friendly interface for a facsimile machine integrating prog
User interface for integrating diverse methods of communication