... of use. Support dual-network of both PSTN landline and GSM mobile network, provide redundancy for extra stability. 2. Can ... , monitoring, remote announcement. 11. One Set of normally open signal outputs, relay linkage output, home appliances remote control can be ... via SMS. 15. Panel integrated with either dual-band, triple-band, quad-band GSM/GPRS industrial graded module, stable and reliable. New ...