Unlicensed mobile access optimization
Upstream bandwidth allocation for packet telephony in a...
Upstream data rate estimation
Usage-based billing for voice over packet communications
Use of rtp to negotiate codec encoding technique
Use of virtual gateway in H.323 system
User communication hub for use with an analog phone line
User equipment device enabled for SIP signalling to provide...
User identification module for access to multiple...
User interface for securing lightweight directory access...
User invocation of services in public switched telephone network
Using a handheld communication device with a hot spot network
Using a routing architecture to route information between an ori
Using discrete message-oriented services to deliver short...
Using DSL services to facilitate real-time communications in...
Using internet and internet protocols to bypass PSTN, GSM...
Using XML expressed primitives for platform and...
V.110 over packet networks
V.110 over packet networks
Variable bit rate transmission of AV signal in packet network