Patent ID: 7782494

Claim:
A communication device having a telephone function and a facsimile function, comprising: a detecting portion configured to detect a facsimile activation signal transmitted from a remote device, the facsimile activation signal including a series of an ON state signal and an OFF state signal; a detection result judging portion that judges whether or not the detecting portion detects all of the facsimile activation signal including the series of the ON state signal and the OFF state signal; a receiving portion that starts receiving a facsimile when the detection result judging portion determines that the detecting portion has detected all of the facsimile activation signal including the series of the ON state signal and the OFF state signal; an audio signal reception judging portion that judges whether or not the detecting portion detects that the OFF state signal is synthesized with an audio signal having both a predetermined level and a predetermined frequency while the detecting portion is detecting the OFF state signal of the facsimile activation signal, wherein the audio signal is other than an on-hold tone; and a detection stop control portion that controls the detecting portion to stop detecting the OFF state signal of the facsimile activation signal when the audio signal reception judging portion judges that the OFF state signal is synthesized with the audio signal having both the predetermined level and the predetermined frequency, and that controls the detecting portion to continue detecting a remaining signal of all of the facsimile activation signal when the audio signal reception judging portion judges that the OFF state signal is not synthesized with the audio signal having both the predetermined level and the predetermined frequency.