Abstract: A call forwarding device based on an IMS includes a terminal and an IMS communication system connected to the terminal. The IMS communication system is respectively connected to an IMS special service number device, an IMS user database and an IMS maintenance device. After the terminal establishes a communication with the IMS special service number device, a forwarding condition and a forwarding number set through an IVR, and a calling number and a called number of the terminal are saved in the IMS user database. When the calling number of the terminal dials the called number, the IMS communication system detects a status of the called number, and a communication is established between the calling number and the forwarding number of the terminal according to the forwarding condition.

Abstract: A method for triggering IMS communication based on a data communication protocol. In a data communication protocol, the various collected sensed data is defined in accordance with regulations specified in the present invention. Connection to a mobile phone, a computer or a hardware device or the like is established by Bluetooth, or by a virtual serial port, or by RS485 or RS232 or the like. If receiving set data matching the data communication protocol, the mobile phone, the computer or the hardware device or the like into which an IMS system client program is embedded automatically triggers the embedded IMS system client program to communicate through an IMS system. Different telecommunication numbers are triggered by different data. The data between the mobile phone, the computer or the hardware device and the data communication protocol is in a SIP-MESSAGE format.