How do traditional telephones exchange information? How do IP phones exchange information?

Traditional telephones exchange information through circuit switching, while IP telephones exchange information through packet switching.

Packet switching technology, also known as packet switching technology, divides the data transmitted by users into a certain length, and each part is called a packet. Each packet is preceded by a packet header indicating where the packet is sent, and then the switch forwards it to the destination according to the address tag of each packet. This process is called packet switching.

CS: Circuit switching (CS) is the earliest and most widely used switching method in communication networks, which is mainly used to complete telephone switching in telephone communication networks.

Telephone communication is divided into three stages: call establishment, call and call demolition. The process of telephone communication is the process of circuit exchange, so the basic process of corresponding circuit exchange can be divided into three stages: connection establishment, information transmission and connection release.