| 摘要 |
If a subscriber send a DTMF information, it is separated into the information by T/S and sent to DSP(32). The inputted DTMF information by T/S is analyzed by 8bit PCM data at the DSP and compared with the information stored at the memory. Therefore, if it is a new information, stored at the temporary memory(33), but if same with the existing stored information, then the comparative behavior about the next bell is repeated without being stored. The CPU(35) read whether a execution command of memory is received or not by periodic retrieval, and if a new information is inputted. The 8bit PCM data by T/S is converted with home tone and voice guidance PCM data and then sent to the line assembling device part(31) through a serial/parallel converting part(39).
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