... GRPS is set to transfer management data automatically.11,Support TCP, UDP, SMS to convey positioning and alarm messages. 12,Precise positioning: ... seconds15,cold-boot time: less than 90 seconds16,Emergency and alarm function17,Anti excess voltage, preventing power supply polarity from ... for global market, communication module is a Tri-band GSM/GPRS engine that works on frequencies EGSM 900 MHz, ...