Gatekeeper constitutes a very important part in IP phone system.
网守是IP电话系统中重要的组成部分。
This paper presents the new services of IP used in power system, including IP net phone, vedio conference system, IP video monitor and client service center based on IP.
介绍了IP新业务在电力系统中的应用，包括IP网络电话、IP视频会议系统、IP图像监控和基于IP的客户服务中心。
We can easily transplant the system into other domains such as faxes encrypting, IP Phone and private data network by changing the interfacing circuit and adding or deleting software modules.
通过适当地修改接口电路和增删软件模块，可以很方便地把所提出的系统方案移植到其它类似的应用领域中，如传真加密、IP电话加密、专用网络的数据加密等。
The result of the test shows that the whole system works well; the transmission is low delay and no significant jitter and achieves the function that IP video Phone is used for voice and video calls.
通过对系统的整体测试，视频电话的效果良好，网络传输延时低、无明显抖动，实现了利用IP视频电话进行语音视频通话的功能。
This paper introduces the design of IP Phone terminal using SIP (Session Initiation Protocol) upon the OMAP5912 platform of a vehicle electronic multi-media video and audio system.
以车载汽车电子多媒体视听系统为研发背景，在OMAP5912平台上采用SIP(会话发起协议)设计了IP电话终端。
The result shows that it is very suitable to make a application of IP phone system in expressway.
结果表明，在高速公路上实施IP电话系统是完全适宜的。
The main function of gateways is to connect IP network and traditional phone system, and provide multi-call signaling exchanging and the conversion of voice formats.
IP电话网关主要功能为连接传统电话网与IP网络，完成多路呼叫的信令协议和语音格式的转换。
Huawei IAD (Integrated Access Device) provides 8-32 phone channels, transferring the information at phone terminals to IP packages to perform the soft switch and billing management system via RS232.
华为IAD可以提供8 -32路电话终端连接，将电话终端的信息转换成IP包，在NGN上实现软交换，并将计费信息通过RS232传给计费系统。
Huawei IAD (Integrated Access Device) provides 8-32 phone channels, transferring the information at phone terminals to IP packages to perform the soft switch and billing management system via RS232.
华为IAD可以提供8 -32路电话终端连接，将电话终端的信息转换成IP包，在NGN上实现软交换，并将计费信息通过RS232传给计费系统。
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