GSM and PSTN alarm system,gsm pstn system,gsm pstn alarm system,gsm security system GSM and PSTN alarm system,gsm pstn system,gsm pstn alarm system,gsm security systemSystem Features l ... (phone) long-distance telephone control for arming, disarming, monitoring, remote announcement. l 1 Set of normally open signal ... home appliances remote control can be realized. GSM and PSTN alarm system for home