Transport of caller identification information through...
Transport of caller identification information through...
Transport of DTMF tones over VOATM/VOIP networks
Transporting ABCD bits using RTP
Transporting telephony signaling over a data network
Transporting voice telephony and data via a single ATM...
Treatments in a distributed communications system
Tunneled datagram switching
UMTS telecommunications system for enabling a mobile station...
Unified access platform for simultaneously delivering voice...
Unified messaging notification
Uniform control of mixed platforms in telephony
Uninterrupted transfer of voice telephony service to derived...
Universal access multimedia data network
Universal access multimedia data network
Universal communications identifier
Universal internet based telephony system that provides...
UNIVERSAL MESSAGING SYSTEM PROVIDING INTEGRATED VOICE, DATA...
Universal Messaging system providing integrated voice, data...
UNIVERSAL MESSAGING SYSTEM PROVIDING INTEGRATED VOICE, DATA...