FSK caller signal automatically refresh existing system date and time, DTMF telephone signal to the original system, the time and date Settings had no effect.
FSK来电信号自动刷新原有的系统日期时间，DTMF来电信号对原系统的时间，日期的设置无影响。
FSK caller signal automatically refresh existing system date and time, DTMF telephone signal to the original system, the time and date Settings had no effect.
FSK来电信号自动刷新原有的系统日期时间，DTMF来电信号对原系统的时间，日期的设置无影响。
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