Figure 7-10 Waterproofing a dustproof cap
(1) Dustproof cap (2) PVC insulation tape (3) Waterproof tape
NOTE
l Before wrapping waterproof tape, stretch the tape evenly until the width of the tape is half of its original
width.
l Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlaps
more than 50% of the preceding layer.
1. Verify that dustproof caps are not removed.
2. Wrap each dustproof cap with one layer of PVC insulation tape from bottom up.
3. Wrap each dustproof cap with three layers of waterproof tape, from bottom up, then from
top down, and finally from bottom up. Do not cut the tape until all the three layers of the
tape are already wrapped. Wrap each layer of tape around the cap tightly.
4. Wrap each dustproof cap with three layers of PVC insulation tape, from bottom up, then
from top down, and finally from bottom up. Do not cut the tape until all the three layers of
the tape are already wrapped. Wrap each layer of tape around the connector tightly.
Step 5 Lay out the jumper by referring to 7.1 Cabling Requirements, and then bind the jumper using
cable ties.
Step 6 Label the installed jumper by referring to Attaching a Sign Plate Label.
Step 7 Attach colored insulation tapes to the jumper by referring to Attaching the Color Ring.
----End
7.7 Installing an RRU Alarm Cable
This section describes the procedure for installing an RRU alarm cable.
Procedure
Step 1 Link the DB9 connector at one end of the RRU alarm cable to the EXT_ALM port on the RRU,
and link the eight cord end terminals at the other end to the external alarm device, as shown in
Figure 7-11.
RRU3232
Installation Guide 7 Installing RRU Cables
Issue 05 (2011-10-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
69
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