... 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 Large LCD ... from panel.l Allow up to 99 wireless defense zones and 4 wired zones.l ... with either dual-band, triple-band, quad-band GSM/GPRS industrial graded module, stable and reliable. Home gsm security system with LCD display ...