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DIP Switch Options
Remove the two screws from the port 1 interface card and pull
it straight up (Figure 3-5). To re-assemble, align the interface
card to the UTA220 PC board, press down, and insert the two
screws.
Figure 3-5. V.35 Switch Location
The V.35/EIA-232 interface card has an eight-position DIP
switch on the bottom (Figure 3-5). The port 2 DIP switch
settings can be changed without removing the port 2 interface
card. Note the orientation of the switch when changing the
settings on port 2. The DIP switch allows you to transpose the
Ring Indicate (RI) and Local Loopback pins (LL). Normally,
RI is found on pin J and LL is found on pin L. However, these
can be transposed (Table 3-2).
V.35 Ring Indicate Local Loopback Pinouts
DIP Switch Position
1
2
3
ON*
ON*
OFF*
*default
UTA220/UTA220k
Getting Started
Table 3-2:
Pin Function
& Location
4
RI
J*
L*
LL
ON
3-5
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