In the DB2 procedure example in Table 6, the SIGNAL statement is used to generate a user-defined SQLSTATE and a message that is returned to the caller through the SQLCA.
Only then it will signal to the caller that the presented certificate was successfully verified.
在此之后,它才会向调用者发出已经成功地检查了提供的证书的信号。
3
The core of Caller ID detection is demodulation of the FSK signal. The common used FSK demodulation algorithm demodulates the FSK signal by spectrum analysis.