Some non-Huawei-certified optical modules have defects in data bus designs. Using such
an optical module on a router causes suspension of the connected data bus on the router.
As a result, data on the suspended bus cannot be read.
l Improper edge connector size damages electronic devices of optical interfaces.
If a non-Huawei-certified optical module with improper edge connector size is used on
an optical interface, electronic devices of the optical interface will be damaged by short
circuits.
l Non-standard temperature monitoring causes incorrect alarms.
The temperature monitoring systems of some non-Huawei-certified optical modules do
not comply with industry standards and report temperature values higher than the real
temperature. When such optical modules are used on a router, the system will report
incorrect temperature alarms.
l Improper register settings cause errors or failures in reading parameters or diagnostic
information.
Some non-Huawei-certified optical modules have improper A0 register values, which
can cause errors or failures when the system attempts to read parameters or diagnostic
information from a data bus.
l Some non-Huawei-certified optical modules are not designed in compliance with EMC
standards and have low anti-interference capability. Additionally, they bring
electromagnetic interference to nearby devices.
l The operating temperature ranges of non-Huawei-certified optical modules cannot meet
service requirements. When they are used under relatively high temperature, the optical
power decreases, resulting in service interruption.
7.2 Understanding Optical Modules
7.2.1 What Is an Optical Module
On an optical network, a sender needs to convert electrical signals into optical signals before
sending them to a receiver, and the receiver needs to convert received optical signals into
electrical signals. An optical module is a component that completes electrical/optical
conversion on an optical network. Figure 7-2 shows the structure of an optical module.
Huawei
AR500&AR510&AR531&AR550&1500&AR2500
Industrial Switch Routers
Hardware Description
7 Pluggable Modules for Interfaces
Issue 10 (2019-03-06) Copyright © Huawei Technologies Co., Ltd. 737
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