What switching technology does IP phone use?

Circuit switching technology and packet switching technology.

IP telephone is a packetized and digital transmission technology based on IP technology. Its basic principle is to compress and encode voice data through voice compression algorithm, and then encapsulate these voice data according to IP and other related protocols.

The data packets are transmitted to the receiving place through IP network, and then these voice data packets are strung together, and after decoding and decompression, they are restored to the original voice signal, so as to achieve the purpose of transmitting voice through IP network.

Extended data:

In the past, IP phones were mainly used in the intranet of large companies, and technicians could reuse the same network to provide data and voice services, which not only simplified management, but also improved productivity.

IP telephone is a telephone service that is opened according to the network technical content stipulated by Internet protocol. Chinese translation is VoIP or VoIP, which simply means real-time voice transmission service through the Internet. It is a brand-new communication technology, which uses the Internet as the medium of voice transmission to realize voice communication.

Because of its low communication cost (internet communication cost is 6 minutes and 6 cents per minute, while the international communication cost of ordinary telephone is more than one yuan per minute 10), some people call it cheap telephone.

Baidu encyclopedia -IP phone