Call signaling approach to user self-provisioning on VoIP...
Call signature in a packet-based network
Call transfer using session initiation protocol (SIP)
Call waiting feature for a telephone line connected to the...
Call waiting feature for a telephone line connected to the...
Call waiting feature for a telephone line connected to the...
Caller identification and voice/data synchronization for...
Caller information provision
Caller IP address
Caller-controlled routing to non-SIP/non-TEL URI...
CD-ROM on which a program for functioning as an IP telephone...
CDMA mobile data communication system and a method of...
Cell selector method and apparatus for use in time division mult
Cellular network service over WLAN
Cellular network/WLAN VoIP service interaction by home...
Central office line card with code recognition for...
Centralized interworking function for a mobile radio network
Change of codec during an active call
Channel assignment in a spread spectrum CDMA communication...
Channel data extracting circuit and extracting method