l
If optical signals are lost during the operation of a device, use the preceding method to
clean the receptacle or the optical connector. In this manner, the possibility of contamination
can be excluded.
Precautions for the overload-caused burnt optical module
l
When using an OTDR to test the connectivity or the attenuation of optical signals,
disconnect the optical connector from the optical module. Otherwise, the optical module
is probably burnt.
l
When performing a self-loop test, use an optical attenuator. Do not loosen the optical
connector instead.
l
It is required that a long-distance optical module input optical power smaller than -7 dBm.
If the input optical power is larger than -7 dBm, you need to add an optical attenuator. For
example, if the transmiting optical power is X dBm and the optical attenuation is Y dB, the
receiving optical power is X-Y, which must be smaller than -7dBm (X-Y<-7 dBm).
Other precautions
l
The optical connector should be horizontally inserted in the receptacle to avoid damages
to the receptacle.
l
Mixed use of multi-mode and single-mode optical fibers is prohibited. Otherwise, faults
such as signal loss may occur.
D.2 155 Mbit/s SFP/eSFP Optical Module
The STM-1 SFP optical module, with the transmission rate ranging from 100 Mbit/s to 155 Mbit/
s, the wavelength being 1310 nm or 1550 nm, and the transmission distance ranging from 2 km
( 1.24 mi. ) to 100 km ( 62.14 mi. ), can be applied to the STM-1/OC-3 POS interface, ATM
interface, or FE optical interface .
lists the currently available 155 Mbit/s SFP/eSFP optical modules.
HUAWEI NE40E-X1 & NE40E-X2 Universal Service
Router
Hardware Description
D Optical Module
Issue 02 (2011-09-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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