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Internet telephony consists of a combination of hardware and software that enables you touse the Internet as the transmission medium for telephone calls. For users who have free,or fixed-price Internet access, Internet telephony software essentially provides freetelephone calls anywhere in the world. In its simplest form, PC-to-PC Internet telephonycan be as easy as hooking up a microphone to your computer and sending your voicethrough a cable modem to a person who has Internet telephony software that iscompatible with yours. This basic form of Internet telephony is not without its problems,however. Connecting this way is slower than using a traditional telephone, and thequality of the voice transmissions is also not near the quality you would get when placinga regular phone call.

互联网电话技术融合了硬件与软件，使您能够将互联网作为电话通话的传输媒介。对于拥有免费或固定价格互联网接入的用户而言，互联网电话软件实质上提供了全球范围内的免费电话服务。在其最简形式中，个人电脑之间的互联网电话通信可以简单到只需将麦克风连接至您的电脑，并通过有线调制解调器将声音信号发送至拥有与您兼容互联网电话软件的接收者。然而，这种基本的互联网电话方式并非完美无瑕。相较于传统电话，此种连接方式速度较慢，且声音传输的质量亦无法与传统电话通话相媲美。