什么是VoIP？

1. Overview

In this tutorial, we’ll learn about VoIP technology, how it works, and its features.

2. What Is VoIP?

VoIP stands for Voice over Internet Protocol. It’s a technology that allows people to make voice calls and video calls over the Internet instead of traditional phone lines.

We can use VoIP to communicate with both VoIP users as well as traditional telephone users. Further, we can use VoIP for communication between two people or for conference calls among multiple participants. VoIP has many features, such as video conferencing, and can be used with a variety of devices, including smartphones, desktop computers, and special VoIP phones.

3. How Does It Work?

VoIP transmits data over the internet instead of traditional telephone lines. Therefore, it has to convert the analog voice signals to digital data packets before sending them over the internet. Let’s see the steps that are taken when a VoIP call happens:

1. When the user speaks into the microphone or a headset, their voice is captured and converted into an analog voice signal
2. The analog signal is converted into a digital signal using an analog-to-digital converter (ADC). Moreover, this digital data is usually compressed to reduce bandwidth usage
3. The digital voice data is turned into small data packets that can be transmitted over the internet. In addition, each packet contains the IP address of the destination and the sender
4. The packets are sent over the internet
5. After the packets reach their destination, they get reassembled and uncompressed
6. The digital signal is converted back into an analog signal using a digital-to-analog converter (DAC)
7. The analog signal is played through the recipient’s device

4. VoIP Features

VoIP has many features and advantages compared to traditional telephone lines. Some of them are:

• In many cases, calls made using VoIP are less expensive compared to regular telephone calls because they use the internet instead of telephone lines
• VoIP services also provide features like call forwarding, call recording, and voicemail
• We can use VoIP to make phone calls, video calls, and even send text messages
• VoIP services are internet based and portable. Therefore, we can make and receive VoIP calls from anywhere with an Internet connection
• VoIP supports many devices. We can access VoIP using smartphones, tablets, desktop computers, VoIP phones, and traditional telephones with an adapter
• VoIP services are scalable and can scale up to meet the needs of a growing business

5. Conclusion

In this article, we discussed VoIP – a flexible, easy-to-use, and low-cost way to make phone calls for businesses as well as individuals.

There are many VoIP service providers available that we can choose from, and each of them has its own set of features.