voice over Internet protocol
Voice over Internet Protocol technology
Voice over Internet Protocol VoIP
IP电话技术
网络语音电话业务VoIP
网路电话VoIP
voice over internet protocol(VoIP) network
VoIP Voice Over Internet Protocol
基于因特网的语音传输
基于IP网络的语音传输
网络协议语音服务系统
VOIPF Voice – Over Internet Protocol Forum
VOIPF Voice C Over Internet Protocol Forum
Internet protocol over ATM
internet Protocol Internet
Transmission Control Protocol╱Internet Protocol
Gateway-Gateway Protocol
Gateway-Gateway Protocol GGP
broadband voice gateway
double modulationdata over voice
dual-mode voice gateway
Foreign Exchange Station voice gateway