FRONT PANEL
Serial 1
 RT format corrections for connection to SPEEDBOX / SPEEDBOX INS
SIM Card
 Socket for SIM card for network access
USB Connection to PC for configuration
REAR PANEL
4G Main
 Main antenna for network connection
4G Aux
 Optional antenna to improve reception for network connection
Modem - Serial 2
 RT format corrections or RTCM format output to receiver / radio modem
Power Lemo connector for power connection