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IP电话是Voice over IP network的简称,它是指IP层上的话音传输,包括IP上的传真和多媒体。IP电话是随着Internet高速发展而出现的一种新颖的通信传输方式。它以计算机为基础,使用Internet作为连接通道,实现PSTN(普通电话交换网)与Internet互连,并转往远端的PSTN,使双方可以实现长途通话。 目前用户通过Internet网打IP电话主要有以 下3种形式: 1.通话双方均为网上用户,直接使用电脑通过网络电话软件实现Internet通讯。 2.通话的双方一方用电脑,另一方用普通电话的Internet通讯。
An IP phone is short for Voice over IP network. It refers to the voice transmission over the IP layer, including fax and multimedia over IP. IP telephony is a novel communication transmission method that emerged with the rapid development of the Internet. It is computer-based, using the Internet as a connection channel, interconnecting the PSTN (General Switched Telephone Network) with the Internet, and to the remote PSTN so that both parties can make long distance calls. At present, users make IP phones through the Internet network mainly in the following three forms: 1. Both parties of the call are online users and directly use the computer to realize Internet communication through Internet telephony software. 2. The two parties to a call with a computer, the other using ordinary telephone Internet communications.