Gatewary语音网关:Provides translation between VoIP and non-VoIP
networks, such as the publicswitched telephone network(PSTN). It also
provides physical access for local analog and digital voice devices,
such as telephones, fax machines,key sets, and PBXs.数字信号与模拟信号的转换
Videoconference station 视频会议终端:Provides access for end-user
participation in videoconferencing. The videoconference station contains
a video capture device for video input and a microphone for audio
input. The user can view video streams and hear the audio that
originates at a remote user station.
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