3. Link the 2-hole male connector at one end of the WGRU power cable to the POWER port
on the back panel of the WGRU, and then link the OT terminal at the other end to the
LOAD7 or LOAD8 terminal on the DCDU-03B, as shown in Figure 12-9.
Figure 12-9 Installing a WGRU power cable
4. Route the power cable along the right of the DCDU-03B to the back of the WGRU to avoid
blocking the front panels of the DCDU-03B and WGRU, and then use cable ties to bind
the cable securely. For details, see 12.4.1 Cabling Requirements.
Step 5 Install a PPS signal cable and GPS signal cable, as shown in Figure 12-10.
NOTE
A GPS signal cable transmits GPS signals over the COM1 port, and a PPS signal cable transmits PPS signals
over the PPS1 port.
The PPS signal cable or GPS signal cable has an RJ-45 connector at each end before delivery. Before cable
connection, you must cut the RJ-45 connector at one end of each cable to expose the bare wire terminal.
1. Link the RJ-45 connector at one end of the PPS signal cable to the PPS1 port on the front
panel of the WRGU, and then link the bare wire terminal at the other end to the RGPS port
on the USCU in the BBU. Table 12-1 lists the pin assignment for the bare wires.
2. Link the bare wire terminal at one end of the GPS signal cable to the COM1 port on the
front panel of the WRGU, and then link the RJ-45 connector at the other end to the RGPS
port on the USCU in the BBU. Table 12-1 lists the pin assignment for the bare wires.
DBS3900 (Ver.B)
Installation Guide
12 Indoor Scenario with DC Power Supply (BBU Installed in
a 19-Inch Rack)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
410
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