| 摘要 |
PROBLEM TO BE SOLVED: To perform a predetermined control while preventing malfunction, based on a DTMF signal included in the sound signal during a call.SOLUTION: A cellular phone 1 includes a detector 21 for detecting an originating call and a terminating call, a determination unit 22 for determining whether or not an originating call and a terminating call thus detected are for a specific telephone number, and an extraction unit 23 for extracting a DTMF signal from the sound signal during a call, on condition that an originating call is for a specific telephone number, or a terminating call is from a specific telephone number. |
