9
For the Model 3510 DSU, the straps are concealed behind the faceplate.
To remove the faceplate to change the hardware straps:
Procedure
1. With your thumbs under the edge of the front bezel, firmly press upward to lift the
bezel from the tabs securing it in place.
2. Swing the front bezel up and set the bezel aside.
3. Refer to the tables included in this section to determine which switches need to be
changed. Then, using a small instrument, carefully change the position of the
switches.
4. Reinsert the front bezel’s hinge tabs into position and swing the bezel down. Snap
the bezel back into place.
The following figure shows the physical location of the straps on a Model 3511 DSU.
The straps are not concealed, as they are on the Model 3510 DSU, and should be set
before the DSU is installed in a COMSPHERE 3000 Series Carrier.
P7
98-12308a
NONREPLACEABLE
FUSES
S1
S3
S2
S5
FRONT
(F)
REAR
(R)
J6
J5
J101
Model 3511 DSU Strap and Fuse Locations
The straps for both models are listed and described in Table 1 through Table 3. Table 4
lists all possible network addresses that can be selected by S4 strap settings. Factory
strap settings for both the 3510 and 3511 DSUs are shown in the tables.
NOTE:
Location of the switch markings may vary. For clarification, switches positioned
toward the front of the circuit card (F) are always Off, while switches positioned
toward the rear (R) are always ON.
