155 Mbit/S Sfp/Esfp Optical Module - Huawei NE40E-X1 Hardware Description

HUAWEI NE40E-X1 & NE40E-X2 Universal Service
Router
Hardware Description
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Precautions for the overload-caused burnt optical module
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Other precautions
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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 .
Table D-1
Issue 02 (2011-09-10)
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.
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.
When performing a self-loop test, use an optical attenuator. Do not loosen the optical
connector instead.
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).
The optical connector should be horizontally inserted in the receptacle to avoid damages
to the receptacle.
Mixed use of multi-mode and single-mode optical fibers is prohibited. Otherwise, faults
such as signal loss may occur.
lists the currently available 155 Mbit/s SFP/eSFP optical modules.
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D Optical Module
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