Patent ID: 7933047

Claim:
A facsimile apparatus comprising: a communication unit configured to perform facsimile communication; a line seizing unit configured to seize a public line in order to transmit facsimile data by the facsimile communication; a determining unit configured to determine, in a case where said line seizing unit has seized the public line, which of a dial tone signal or a voice signal for a phone call a signal received from the public line is; a control unit configured to control said communication unit to perform the facsimile communication in a case where the received signal is determined as the dial tone signal, and not to perform the facsimile communication in a case where the received signal is determined as the voice signal; a first detection unit configured to detect the received signal of a first frequency band including a frequency of the dial tone signal; and a second detection unit configured to detect the received signal of a second frequency band different from the first frequency band, wherein said determining unit determines the received signal as the voice signal in a case where said first detection unit detects the received signal and said second detection unit detects the received signal, and determines the received signal as the dial tone signal in a case where said first detection unit detects the received signal and said second detection unit does not detect the received signal.