3 using the device, Power statue led, Signal strength indicator – UTStarcom UM100C User Manual
Page 26: 4 unplugging or ejecting the modem
5.3.3 Using the Device
Power statue LED
Green: Power OK.
Red: Not enough power. If you see Red on the power status LED it is
recommend that you use the USB modem extension Y cable.
Signal strength indicator
0~4: weak or no signal strength, 4: high signal strength.
Note: Make sure to complete the unplugging/ejection process before
removing the UM100C. If you remove the device improperly, the product may
5.3.4 Unplugging or Ejecting the modem
Make sure to complete the unplug/eject process on your computer before
removing the UM100C from your PC. If you remove the USB device
improperly, the product may be damaged.
Double click the Unplug/Eject Hardware icon in the system tray.