To prevent repetitions of call origination transmission and to instantaneously indicate erroneous call origination of a user.

This communication equipment connected to a communication channel is provided with a transmission signal generation means 3 for sending out equipment information request signals and a reception signal analysis means 2 for analyzing equipment information. Furthermore, MF signals are used for the request of the equipment information, and an equipment information response to the equipment information request is a code for indicating whether it is facsimile machine, a telephone set, shared equipment for facsimile machine and the telephone set, a modem, shared equipment of modem and facsimile machine or shared equipment of modem, telephone set and facsimile machine.