Hot Selling GSM PSTN Gateway 1 Sim Card

GSM + PSTN products enables GSM, PSTN two lines of inbound and outbound, exhale when the pre-set according to the rules to choose GSM or PSTN. Also it has lines detection feature, when PSTN is not availale, automatically go to GSM exhale. When GSM has no signal. Or no SIM card inside. Automatically go to PSTN exhale. NameQuantityRemarkgsm pstn gateway-8848 1pcsDual band or QuadbandAc- adapter1pcsAC-110-240V, DC12V/1AAntenna1pcsMagnetic Antenna with 3m cableUser's Manual1pcsEnglish Advantages: 1)Strong signal 2)IMEI changeable 3)SIM Card supported(1.8V, 3V) 4)Supports DTMF 2'ND dialing out 5)Locking PIN / network (optional) 6)Hides subscriber ID (been sent out) 7)Backup lithium-ion battery(optional) 8)Connects Alarm systems for security use 9)Provides reversal polarity signal for metering 10)Compatible to most telephones, PBX and VoIP gateways 11)Provides optimized circuit connecting the exchange device for Extension