... displays2. GSM+PSTN dual network. If PSTN is disable, it will switch to GSM automatically3. Calendar ... l 2-Band GSM: GSM900/1800Mhz(4-Band is optional: 850/900/1800/1900Mhz)l GSM ... list1 Main alarm set, 2 wireless remote control,1 pir sensor,1 door sensor, 1 ... the world KT-G8A Dual-network wired&wireless alarm system ,pstn and gsm alarm system KT-G8A Dual-network wired&wireless alarm system ,pstn and ...