The invention relates to a switching control method for public switched
telephone network (PSTN)-
Internet protocol (IP) network cooperative communication. The method is used for non-audio
communication control between PSTN-IP network cooperative
multimedia telephone terminals. Communication connection is initiated by PSTN telephone dialing, telephone numbers are taken as positioning identifiers of the
multimedia telephone terminals, PSTN circuit auxiliary
authentication, dynamic IP addressing and switching are performed by utilizing a
server system of an IP network, IP-network-based non-audio communication connection is finally established, and non-audio communication is realized between the
multimedia telephone terminals. An IP-network-based non-audio communication connection protocol is taken as a core, and a login / logout control protocol, a charging
information acquisition protocol and a security control protocol are also involved. By the method, a complete non-audio communication protocol is provided, the separate transmission of audios and videos is realized by a PSTN
circuit switching network and the IP network, and the short
delay of audio communication and the high quality of video communication are ensured at the same time.