Network Router User Manual
internal terminator is installed, a jumper on header JP1 is used to congure the type of
termination. In order to do this the case must be opened. Disconnect the power and network
before opening the case. Use caution and appropriate electrostatic safety precautions whenever
working with the case removed. If the center pin of JP1 is jumpered to the pin labeled Free, then
the terminator is set for free topology mode. If the center pin of JP1 is jumpered to the pin labeled
Bus, then the terminator is set for bus mode. If the center pin is not jumpered to either the Bus or
Free pins then the terminator is disabled. e following gures show photos of JP1 withe the
jumper in the 3 dierent settings.
Fig.1.15: Optional internal terminator disabled
Fig.1.16: Optional internal terminator set to Free Topology mode
Fig.1.17: Optional internal terminator set to Bus mode
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