Patent ID: 7660023

Claim:
A facsimile apparatus comprising: a line I/F section that transmits and receives a signal through a network to which an exchange is connected; a modem signal detection section that detects a modem signal transmitted through the network; a ring signal detection section that detects a ring signal transmitted through the network from the exchange; a switch section that switches a signal detection mode of the line I/F section between a ring signal detection mode in which the ring signal detection section detects the ring signal and a modem signal detection mode in which the modem signal detection section detects the modem signal, such that the modem signal is not detected during the ring signal detection mode and the ring signal is not detected during the modem signal detection mode; an interrupt section that generates an interrupt signal when the ring signal is received; and an operating state determination section that determines an operating state of the facsimile apparatus; wherein: if the operating state determination section determines that the facsimile apparatus is in a standby mode where the facsimile apparatus enables to be usually used, the switch section switches the signal detection mode into the ring signal detection mode; and if the interrupt section generates the interrupt signal in the modern signal detection mode, the switch section switches the signal detection mode into the ring signal detection mode.