IP telephone system having a hold function and a callback...
IP telephone system, IP telephone apparatus and calling method
IP telephone system, IP telephone apparatus and method for...
IP telephone system, IP telephone apparatus and method for...
IP telephony apparatus providing simultaneous SIP...
IP telephony gateway—solution for telecom switches
IP telephony network using a configuration map for...
IP telephony network using a configuration map for...
IP telephony system, VoIP terminal, and method and program...
IP telephony transport
IP voice call surveillance through use of non-dedicated IP...
IP-based base station system
IP-based enhanced emergency services using intelligent...
IP/telephony user interface for a hybrid communication system
ISDN terminal adapter capable of automatically changing from a p
Isochronous transmission for IP-oriented network
ITU H450.1-based ITU H.323 SCP method and apparatus