The principle of texting is based on Socket.

The landlord should have heard of the convergence of three networks, telephone network, internet and radio and television network.

1. Sending SMS by mobile phone is a service in telephone network, and there is a special SMS server to complete transmission billing.

2. When the mobile phone communicates with the Internet, the mobile phone really needs IP. The IP of the mobile phone is actually the proxy IP of the mobile operator, so it is often seen that many mobile phones leave the same IP on the Internet.

3. SMS is the communication between mobile phones. Without the internet, natural operators have to make money by charging, and the charging process is completed by the authentication and billing server of the telephone network.

4. When the mobile phone sends data to the PC on the Internet, it is GPRS traffic instead of SMS, and the traffic is also collected by the operator. Because every data packet you send has to pass through the interface between the telephone network and the Internet, the PC can receive the data packet, so the operator can detect the traffic of your mobile phone and complete the charging operation.

5. SMS service extended to PC? Yes, the communication between Fetion mobile phone client and PC client is perfect, but it consumes GPRS traffic. You don't need another PC SMS client, hehe, don't you think this mode is strange?

6. the telephone network and the internet can be completely integrated, but the reasons for policy interests are difficult ~ how to divide the cake? After the integration, it is all IP mode, and voice and data communication are all IP layer exchanges.