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Installing Cables
c
Connecting Ethernet Cables or Optical Fibers to the Main Processing Board
c2 Installing an FE/GE Ethernet Cable
1. Connect the RJ45 connector at one end of
the Ethernet cable to the FE/GE0 port on the
UMPT/LMPT, the FE/GE1 port on the LMPT, or
the FE/GE2 port on the UMPTe3.
2. Connect the other end of the FE/GE
Ethernet cable to the electrical port of an
external transmission device.
d
Connecting a CPRI Optical Fiber
1. Unbuckle the optical module
and then insert the optical
module into the CPRI port on
the UBBP/LBBPd4 board.
3. Route the optical fiber along the left side of the cabinet and lead the cable out through the
bottom cable outlet of the cabinet.
4. Bind the cables properly using the optical fiber binding strap based on BBU cable claw
positions.
5. Install the winding pipe at the end of the optical fiber. Ensure that the winding pipe is installed
at the position between the optical fiber connector and the first optical fiber binding point. (The
method is the same as that for installing an optical fiber.)
e
Installing a GPS Clock Signal Cable
1. Connect the SMA end of
the GPS clock signal cable to
the GPS port on the
UMPT/LMPT board.
UMPTb2
2. Remove the dust-proof
cap from the optical
connector, and insert the
optical fiber into the optical
module.
2. Lay out the GPS clock signal cable
in the cabinet, and lead the end with a
type N female connector through the
cable outlet module to the Protect
port on the GPS surge protective
device (SPD).
4
NOTICE
•
When the optical fiber remote
distance between BBU and eRRU is
from 10 km to 20 km, a 3 dB optical
attenuator needs to be added
between the optical module of
UBBP/LBBPd4 board and CRPI
optical fiber.
•
If you use an optical fiber with an LC
connector on each end, connect TX
port on the BBU board to the RX port
on the eRRU, and connect the RX
port on the BBU board to the TX port
b
on the eRRU.
Layout of the GPS clock
signal cable in the cabinet
UMPTb2
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