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Installation Manual – Hardware Installation
BBU3806 WCDMA Base Band Unit
2)
Insert the optical fiber connector immediately into the corresponding optical
sub-board or flange after cleaning it lest the corresponding port on the sub-board
or flange becomes dirty.
3)
Do not touch the end face of the optical fiber connector after cleaning it. Cover it
with a protective cap if it is not in use for the moment.
4)
Clean the flange on the optical subboard and the optical port in the board only
when:
The detected optical power performance of the subboard supporting optical
power detection is greatly different from the actual measured optical power.
The subboard that does not support optical power detection reports alarms or the
transmit optical power of the subboard is greatly different from the typical optical
power even if the receive optical power is within its working range.
5)
Examine the optical port surface using a fiber microscope. Make sure that the
optical port is clean.
When the Raman amplifier applies to the wavelength division multiplexing (WDM)
system, examine the surfaces of all optical ports before the input ports using a
fiber microscope.
Examine the surfaces of all optical ports on the link of long-distance transmission
(over 120 km) of WDM equipment and 10G MADM equipment.
D.4 Precautions
I. Fiber Protection
The protection requirements for optical fibers are as follows:
Never bend fibers smaller than 90°.
Coil up extra fibers into a round or "8". Never wind them around each other.
Never apply more than 1 kg axial tension to a fiber. Never hang anything on only
a fiber.
Never apply any impulse force to the axis of a fiber. Protect the optical fibers
from crush.
Never place any optical fiber at 85 °C or higher.
II. Laser Safety
Never look at the exit of an optical fiber directly lest the laser injures eyes.
D.5 Cleaning Methods
D.5.1 Cleaning End Face of Optical Fiber Connector
Use the following cleaning means to clean the end face of an optical fiber connector.
Appendix D Cleaning Optical Fiber Connectors
Huawei Technologies Proprietary
D-3
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