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CHAPTER 3: Configuration
3.3 Setting the Jumpers
The V.35 SME also has three pairs of jumpers—JP1, JP2, and JP3—mounted
on its main circuit board (see Figure 3-4 below; the jumpers are shown in
their factory-default settings). Use these jumpers to independently set
clocking, carrier, and RTS/CTS delay for Ports A and B. (You will probably
have to use needle-nosed pliers to move the jumpers.)
Figure 3-4. The internal controls: The jumpers.
Notice that in each pair of jumpers, one jumper controls the setting of Port A
and the other controls that of Port B. Also notice that each jumper has three
possible settings: covering posts 1 and 2, covering posts 2 and 3, or “removed”
(usually left covering only a single post, so it doesn’t get lost). The detailed
descriptions of each jumper pair on the next page list all possible jumper settings.
JP3
1
2
3
JP1
1
2
3
JP2
1
2
3
Port
B
Port
A
Controls Port A
Controls Port B
Jumpers
DIP
Switch