當有 incoming call 時，GSM module 會一直傳進 +CRING: VOICE 這時候以 CResponse::ParseNotification() parse 得知有 incoming call else if (MatchStringBeginning(szPointer, "+CRING: ", szPointer)) { // Ring notification //NKDbgPrintfW(TEXT("Derek: Ringing...\r\n")); // Need to ask for the call list to send the differences. The new incoming call better // be in the call