User Manual

N5105I-IM-A R2.0
2-6
2.5 Jumpers
A jumper is a metal bridge that closes an electrical circuit. It consists of two metal
pins and a small metal clip (often protected by a plastic cover) that slides over
the pins to connect them. To “close” (or turn ON) a jumper, you connect the pins
with the clip. To “open” (or turn OFF) a jumper, you remove the clip. Sometimes a
jumper consists of a set of three pins, labeled 1, 2, and 3. In this case, you connect
either pins 1 and 2, or 2 and 3. A pair of needle-nose pliers may be useful when
setting jumpers. You can congure your motherboard to match the needs of your
application by setting the jumpers.
This section illustrates the default settings and conguration options of the
jumpers, and provides instructions on how to congure your motherboard by
setting them.
1. RJ11 VCC selection jumper (3-pin RJ11_VCC_SEL)
21 2 3
+12V
(Default)
+24V
RJ11_VCC_SEL
Connector type
HEADER 1x3p, 2.54mm pitch, S/T