The advantages and disadvantages of data exchange technology, telephone, IP telephone and telegraph are urgently needed! !

Compared with traditional phones, IP phones have the following advantages:

(1) saves bandwidth. The bandwidth consumed by circuit-switched telephones is 64Kkbps. The IP phone only needs 6 ~ 8 Kbps (even lower than 2.4Kkbps), which saves bandwidth and reduces costs.

(2) The call cost is low. As the cost decreases, the call cost will also decrease, especially for long-distance communication.

(3) Intelligence is easy to integrate. IP telephone network inherits the intelligent module of computer network and can flexibly control signaling and connection, which is beneficial to the development of various value-added services.

(4) Open architecture. The protocol system of IP telephone is open, which is conducive to the standardization and interconnection of products of various manufacturers.

(5) Integration of multimedia services. IP telephone network supports the transmission of voice, data and images at the same time, which lays the foundation for providing multimedia services in an all-round way in the future.

According to the old saying, in order to stress practical results, especially news, newspapers adopted the most advanced mode of communication at that time-telegraph. It has been used until now, just like an airplane. The early planes were made of wood, but the plane next to Mu Zi was also made of wood.

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