从技术上，IP网络电话是以IP为标志的网络分组化和以多媒体为标志的网络业务综合化两大主流技术融合的结果。
Technically, IP network telephone whether taking IP as sign network divide into groups take and taking multimedia as sign network business totalization two heavy major results that technology merge.
比如可视电话、会议电视等，这些被称作视像业务，也叫多媒体业务。
Things like videophone and videoconferencing are usually called video services. This type is also regarded as multimedia services.
已经为建立多媒体会议系统制定了H。 323建议，并且己经在IP电话业务中得到广泛的应用。
The ITU-T has established the H. 323 protocol to build the media conference system, and which is widely applied in the operation of IP telephone operation.
固定比特率网络（诸如ISDN）上的可视电话、会议电视以及其他会话型多媒体业务依据建议H.221中所描述的多路复用结构。
Videophone, videoconferencing and other conversational multimedia services on fixed bit-rate networks (such as ISDN) depend on the multiplex structure described in Recommendation H. 221.
固定比特率网络（诸如ISDN）上的可视电话、会议电视以及其他会话型多媒体业务依据建议H.221中所描述的多路复用结构。
Videophone, videoconferencing and other conversational multimedia services on fixed bit-rate networks (such as ISDN) depend on the multiplex structure described in Recommendation H. 221.
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