| 摘要 |
PROBLEM TO BE SOLVED: To perform proper reception processing in accordance with a signal to be received after reception of an originator information signal in a communication terminal device corresponding to originator information notification service. SOLUTION: An incoming call detecting unit 7 detects an incoming call signal (call signal, information reception terminal activating signal etc.) received by a line control unit 2 from a telephone line, and transmits it to a main control unit 1 and to a counter 18. A data decoding unit 8 decodes originator information from a modem signal received by the unit 2 and transmits it to the unit 1. A polarity reversion detecting unit 17a detects the polarity reversion of the telephone line, and notifies the unit 1 of it. The unit 1 determines a first incoming call signal as an information receiving terminal activating signal and a second incoming call signal as a call signal in the state where the polarity reversion of the telephone line is detected. When the incoming call signal is the call signal, a call tone outputting unit 12 makes incoming call ringing, and a display unit 14 displays the originator information. COPYRIGHT: (C)2006,JPO&NCIPI
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