... three core plug Airlines Serial interface, GPS status, system information Raw data interface, GPS Compass, 1, DB-9 ,9600-N ... supports SNMP, check that and other agreementsDisplay Indicator: Power, GPS, Compass, GLONASS, rubidium clocks, to maintain, fault LCD display: ... year, month, day, hour and working conditions Compass GPSGLONASS Keyboard: Set the control, station control, the coordinate ...