To access the Model 2089’s internal PC boards, insert a small flat-
blade screwdriver between the connector and the lip of the case and
twist gently as shown in Figure 3 (below).
Both DIP switch S1 and S2 are marked with individual switch
numbers 1 thru 4. Use these numbers, as well as the “ON” designation
to orient the switch properly (see Figure 4, below). Use a small screw
driver or similar instrument to set each individual switch.
5
“ON”
“OFF”
Figure 4.
Close-up of DIP switches S1 and S2, showing ON/OFF orientation.
1
2
3
4
Figure 3.
Opening the Model 2089’s plastic case with a small screwdriver
ON
10. BEND the top half of the case as necessary to place it over the
strain relief assembly. Do not snap the case together yet.
11. Insert one captive screw through a saddle washer and then
insert the captive screw with the washer on it, through the hole in the
DB-25 end of the case. Snap that side of the case closed. Repeat the
process for the other side. This completes the cable installation
process.
4.1.2 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45
The RJ-11 and RJ-45 connectors on the Model 2089’s twisted pair
interface are pre-wired for a standard TELCO wiring environment. The
signal/pin relationships are shown below:
RJ-11
SIGNAL
RJ-45
SIGNAL
1 ...................GND
†
1 ...................N/C
2 ...................RCV-
2 ...................GND
3 ...................XMT+
3 ...................RCV-
4 ...................XMT-
4 ...................XMT+
5 ...................RCV+
5 ...................XMT-
6 ...................GND
6 ...................RCV+
7 ...................GND
8 ...................N/C
†
Connection to ground is optional
(Continued)
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