Northern Telecom DMS-100 Series Installation And Maintenance Manual page 74

0 297-2121-226
0 VINTAGE 05.01
0 1. Hold the DU facedown and unfasten the six screws.
0 2. Turn the
0 will not fall out when the unit is turned over.
0 3. Figure 4.1 on page 4-3 shows the location of
0 tion DIP
0 small screwdriver to set the switches as shown in
0 on page 4-4.
0 On the NT4X25AF /AG /AH /AK data units, the circuit card that
0 the DIP switches are located on faces down.
0 from the unit to gain access to the DIP switches.
0 4. After the configuration switches are
0 cover.
0 5. While holding the top and bottom cover together, turn the DU
0 facedown and fasten the screws.
0 4-2
DU faceup, then remove the top cover.
switches (SW1 and SW2).
The screws
the configura-
Use the tip of a pen or
Figure 4.2
Remove the card
set, replace the top