IP phone transmits the voice data through the grouping network that is the main communication channel for the people in conversation.
IP电话是将语音数据通过分组网络传输的，用分组网络作为会话者的主要通讯信道。
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。
IP video Phone is an integrated service that can implement voice and video calls on IP network.
IP视频电话是指在IP网络上实现语音和视频通话的一项综合业务。
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。
But because IP network is not secure, the IP phone which base on it has same problem.
但是由于IP网是一个不安全的网，有很多潜在的不安全因素，IP电话也同样存在安全性问题。
Traditional IP phone must depend on PSTN or PC when working, so this thesis proposed a Design of Voice-Terminal for network-conference Based on DSP.
目前的IP电话都必须依赖传统的公众电话网（PSTN）或PC机来实现，针对这种现状，本论文提出了一种基于DSP技术的网络会议电话的语音终端系统实现方案。
Traditional IP phone must depend on PSTN or PC when working, so this thesis proposed a Design of Voice-Terminal for network-conference Based on DSP.
目前的IP电话都必须依赖传统的公众电话网（PSTN）或PC机来实现，针对这种现状，本论文提出了一种基于DSP技术的网络会议电话的语音终端系统实现方案。
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