... , event log, auto dial, wat GSM/PSTN alarm panel with 2wired output which uses the SMS to control the wired outputthis SN2301GSM ... , the special is the SN2301GSM/PSTN alarm system with 2wired output can control the output by SMS. for example : use the mobile phone ... -in siren, and timer Ic, the time keeps right after power off16. Remote control, listen in, speak, arm, disarm, or turn ...