北京九州恒信技术发展有限公司是专业的通讯模块和定位模块的特约分销商和代理商。GPS模块主营品牌有GO-TOP、U-BLOX、HOLUX等；还代理分销SIMCOM公司的GPRS模块，包括SIM300、SIM300C、SIM300D、SIM900全系列模块等。广泛应用于无线公话、商话、数据采集器、GSM汽车防盗、电力抄表、水务、油田、POS机、航运等行业中。Generalfeatures Quad-Band850/900/1800/1900MHz GPRSmulti-slotclass10/8 GPRSmobilestationclassB ComplianttoGSMphase2/2+ Class4(2W@850/900MHz) Class1(1W@1800/1900MHz) Dimensions:24*24*3mm Weight:3.4g ControlviaATcommands(GSM07.07,07.05and SIMCOMenhancedATCommands) SIMapplicationtoolkit Supplyvoltagerange3.4...4.5V Lowpowerconsumption NormalOperationtemperature:-30 Cto+80 CSpecificationsforFax Group3,class1SpecificationsforData GPRSclass10:max.85.6kbps(downlink) PBCCHsupport CodingschemesCS1,2,3,4 CSDupto14.4kbps USSD Nontransparentmode PPP-stackSpecificationsforSMSviaGSM/GPRS PointtopointMOandMT SMScellbroadcast TextandPDUmodeDrivers MUXDriverSpecificationsforVoice Tricodec Halfrate(HR) Fullrate(FR) EnhancedFullrate(EFR) Hands-freeoperation（Echosuppression） AMR-Halfrate(HR)-Fullrate(FR)Interfaces InterfacetoexternalSIM3V/1.8V analogaudiointerface RTCbackup SPIinterface Serialinterface Antennapad I2C GPIO PWM ADCCompatibility ATcellularcommandinterfaceApprovals（ongoing） CE FCC ROHS PTCRB GCF AT T IC ICASA TA