# VoIP

**Published by:** [bses](https://paragraph.com/@bses/)
**Published on:** 2022-09-29
**URL:** https://paragraph.com/@bses/voip

## Content

VoIP mainly has the following three modes: Network telephone: It is a voice call mode completely based on Internet transmission, generally between PCs. IP telephone interconnected with public telephone network: voice transmission is realized through broadband or dedicated IP network. The terminal can be a PC or a dedicated IP phone. VoIP service of traditional telecom operators: voice is transmitted through the backbone IP network of telecom operators. The services provided are still traditional telephone services, using traditional telephone terminals. By using an IP phone card or adding an IP dialing prefix to the dialed number, VoIP services provided by telecom operators are used. VoIP is relatively cheap. This is because VoIP phone is just an application on the Internet. In essence, VoIP phones are no different from email, instant messages or web pages. They can be transmitted between machines connected to the Internet. These machines can be computers or wireless devices, such as mobile phones or handheld devices. Why do some VoIP services charge money, while others are free? VoIP services can not only communicate with VoIP users, but also communicate with telephone users, such as users using traditional fixed line networks and wireless mobile networks. For these calls, VoIP service providers must pay the call fees to fixed line network operators and wireless communication operators. This part of the charges will be transferred to VoIP users. Calls between VoIP users on the Internet can be free. What are the requirements for using VoIP? First, you need to connect to the Internet, which can be the most basic dial-up Internet access, or a more ideal broadband service. The faster the network connection, the better the call quality of VoIP. For example, a high-speed broadband connection allows you to surf the Internet while making phone calls. Second, VoIP software is required. Users can choose a VoIP software to install on a desktop or laptop. Then the computer can make online calls. If you want to convert your home phone to a VoIP dial-up system, you need the help of an adapter. VoIP software can be pre installed separately in a hardware device called "analog telephone adapter", which is mainly installed between the home phone and the broadband modem.

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