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Transient recorder fault indicator;

(1)Wireless communication technology index: a) Cabinet distance wireless: -working frequency:470~510MHz -transmission power:≤10mW（10dBm） -receiving sensitivity:≥ -90dBm -Communication speed :250kbps -Communication distance:≥100m -Network topology:star shape -direction:omnidirection b)wireless communication technology index: Network access:Support wireless DDN（APN）/VPDN Network authentication:Support CHAP、PAP certification Network standard: Support GPRS/EDGE：900/1800 MHz； Support WCDMA/HSPA900/2100MHz -UIM/SIM card:3V，Drawer type seat installation (3)GPS time module: antenna gain26~28dB First start-up time35S Restart time1S Timing accuracy1us (4)Protocol and Agreement: -Power protocol:Support DL／T 634.5 101-2002、DL／T 634.5 104-2002 (5)Network security: Device management security:Support for differentiating user type logins: administrators, maintainers (2)Specification of Acquisition unit: (3)Collection unit Specification: