| 摘要 |
PROBLEM TO BE SOLVED: To provide a telephone set with a beep tone output function as countermeasures against prank calls, capable of effectively making a beep tone output function toward the prank phone caller. SOLUTION: The telephone set 10 is provided with a countermeasure selection detection section 241; and a prank call countermeasure detection section 271 including a line connection consecutive processing section 272, a beep-tone output control section 273, and a line connection interruption processing section 274, when the countermeasure selection detection section 241 discriminates that an arrived phone call is a prank phone call and its own telephone set is hooked on, the line connection consecutive processing section 272 continues line connection, until a prescribed time elapses after the hook-on operation, the beep tone output control section 273 continues the output of the beep tone for the prescribed time, and thereafter the line connection interruption processing section 274 interrupts the line. COPYRIGHT: (C)2007,JPO&INPIT
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