FSK caller signal automatically refresh existing systemdateandtime, DTMF telephone signal to the original system, the timeanddate 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。
3
You will first create a new project and a class that will implement a simple service that returns the systemdateandtime of the server on which the service is running.