Huawei 3 U Quick Installation Manual page 17

7
Connecting Cables
Installing Optical Fibers
WARNING
When performing operations such as installing or maintaining optical
fibers, do not move your eyes close to or look into the optical fiber
outlet without eye protection.
CAUTION
Before routing internal optical fibers, install fixed optical attenua-
tors at the corresponding optical ports on boards according to the
fixed optical attenuator installation table.
If you use the recommended A63B cabinet, it is recommended that
only one optical attenuator be added. If multiple optical attenua-
tors are added, there is a risk that the cabinet door cannot be prop-
erly opened.
Installing an E1 cable with
a negative 45-degree connector
2
1
Installing an E1 cable with
a positive 45-degree connector