User's Manual Part 1

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1.3.2 The Indoor Unit (IDU)
The OS-Gemini IDU is a passive device used to inject the DC supply voltage into the cable
connecting the IDU to the ODU. The IDU also houses status indicators driven from the ODU
over the blue/blue white pair connected to pins 4 and 5 of the RJ45 plugs and sockets
employed.
Figure 3 OS-Gemini Indoor Unit (IDU)
The front panel contains indicators showing the status of the power and Ethernet connections.
The power indicator is illuminated when the IDU is receiving 48 volts from the power adaptor.
The Ethernet indicator normally illuminates when the Ethernet link is working; it flashes when
there is Ethernet activity; the fact that it lights also indicates that the ODU is powered. See
Section 7 for further fault finding information.
The bottom of the IDU houses the Ethernet connection via RJ-45 socket, the power
connection, an entry point for IDU/ODU cabling and the reset button.
Figure 4 OS-Gemini Reset Switch Depressed
The reset switch is used for various purposes identified in Table 2.