1.7.6 (Optional) Installing an CPRI Fiber Optic Cable for
Cascading
This section describes the procedure and precautions for installing an CPRI fiber optic cable
used for cascading two RRU3931Es.
Context
l
The single-mode optical modules to be installed must match the data rate at the optical
ports.
l
Do not twist, bend, stretch, or squeeze fiber optic cables during installation.
l
The cable route depends on actual requirements.
NOTICE
Long-time exposure to the air causes performance exceptions on an optical module.
Therefore, optical modules must be connected to fiber optic cables within 20 minutes
after being unpacked.
Procedure
Step 1
For both RRU3931Es, remove the dustproof cap from the CPRI0 or CPRI1 port. Keep the cap
secure.
Step 2
For both RRU3931Es, insert an optical module into the CPRI0 or CPRI1 port, and remove the
dustproof cap from the optical module.
Step 3
Remove the dustproof cap from the optical fiber connector, tidy the optical fibers, and insert
the DLC connector into the optical module. See
Figure 1-24
.
RRU3931E
Installation Guide
1 RRU3931E Installation Guide
Issue Draft A (2016-03-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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