Carrier communication transmitter, carrier communication system and method for judging hooking quantity of carrier communication system from transmitter

The invention discloses a carrier communication transmitter, a carrier communication system and a method for judging the hooking number of slave transmitters of the carrier communication system, and the carrier communication transmitter comprises a carrier communication interface which is used for accessing a communication line so as to be in communication connection with the slave transmitters; the detection end of the voltage detection circuit is connected with the carrier communication interface, and the voltage detection circuit is used for detecting the voltage value of the carrier communication interface and outputting a corresponding voltage detection signal; and the receiving end of the control circuit is connected with the output end of the voltage detection circuit, and the control circuit is used for determining the number of the accessed slave transmitters according to the voltage detection signal and outputting corresponding number information. According to the invention, the problem that whether