I. Overview of road transport vehicles satellite positioning system vehicle terminal, in line with vehicle traveling data recorder GB GB / T GBT19056-2003 and the Ministry of Transport JT / T 794-2011 "road transport vehicle satellite positioning system vehicle terminal technical requirements", JT / T808-2011 "road transport vehicle satellite positioning system vehicle terminal communication protocol and data format" standard. Vehicle operating parameters can be real-time recording, display and query. Provides real raw data for the vehicle and traffic management, security provide further protection. Through wireless data communication interface (GSM, GPRS, CDMA) and GPS interface with monitoring systems for data centers and mobile location positioning, to meet the various needs of users. This product can effectively record the driver's speeding and driver fatigue driving and other illegal acts, and thus the quality of work of the Division driving personnel to effectively monitor and reduce traffic accidents, improve vehicle operating level. Therefore, the use of this product and supporting platform, can improve the company's overall management level and efficiency, reduce operating costs, improve economic efficiency and competitiveness of enterprises; objective and comprehensive vehicle traffic accident record of the various states and drivers The operation behavior, traffic accident analysis provides scientific basis to protect the legitimate interests of the parties to the accident, the traffic police to facilitate law enforcement and government regulation. Second, the technical indicators 2.1 Terminal Technical parameters Operating voltage: DC9V ~ 36V Working current: <200mA (DC12V) Maximum current: maximum operating current when printing terminals <2000 mA Operating temperature: -20 ~ +70 ℃ Operating Humidity: 20 ~ 95% Communication Module: GSM / CDMA Dimensions: 155mmX190mmX58mm 2.2 communication module parameters Operating voltage: DC3.4V ~ 4.5V, peak current: <2A Dimensions: 35mmX32.5mmX3.05mm Working temperature: -20 ~ +70 ℃ GSM: Support four Band: GSM850/900/1800/1900MHz CDMA: CDMA2000 1X800MHz Antenna: 50Ω omnidirectional antenna, the gain is not less than 6db, low-loss coaxial cable; antenna connector: SLl6-K7/J7, BNC, SMA right angle or 90 degree angle 2.3 Positioning Module Parameters Operating voltage: DC3.0 ~ 3.6V Dimensions: 16mmX12mmX2.4mm Current: 50mA Hot start: <5S Cold start: <60S Baud Rate: 9600bps time pulse: 1PPS Positioning accuracy: <10m Channels: 20 Work Temperature: -40 ~ +85 ℃ Tracking Sensitivity: <-160