This invention relates to a test method for the kind of a calling side terminal device and a call control system applying said method , in which, said method includes: sending a test signal to the calling side terminal device by the PSTN system, judging if the echo signal of said test signal is received, if not, then judging the kind of said terminal device is not the PSTN terminal kind, otherwise, deciding that the kind of the device is the PSTN terminal kind, which realizes the identification to the kind of terminal devices and the identification to the transmission ways in a call link.