Huawei 02351KQB, Hardware Installation And Maintenance Manual

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6.1.3.8 Common Network Cable Faults and Preventive Measures
Table 6-12 lists common network cable faults and preventive measures.
Table 6-12 Common network cable faults and preventive measures
Symptom Cause Preventive Measure
l The device cannot be
powered using PoE.
l The device restarts
frequently.
l A large number of error
packets exist on the
device or services are
interrupted.
A network cable has high
resistance or is too long. Before using network cables
purchased from other
suppliers, use a multimeter
or other tools to measure
cable resistance. If the
resistance of a network
cable does not comply with
the quality requirement of
the PoE standard, as shown
in
Table 6-13 , replace the
network cable.
Non-standard network cable
connectors cause poor
contact with device
interfaces. Before making a network
cable, use a standard go-no
go gauge to test the
connectors purchased from
other suppliers. Replace the
connectors if they do not
comply with the standard.
Wires in a network cable are
connected to wrong pins. After a network cable is
made, use a conduction
tester to measure cable
connectivity. For test details,
see
6.1.3.7 Testing the
Connection of Assembled
Cables
.
A network cable connector
is not crimped securely,
causing poor contact
between the network cable
and pins in the connector. When testing a network
cable with a conduction
tester, gently shake the cable
connector and check
whether indicators on the
conduction tester are in
normal state. If indicators 1
to G turn on in a wrong
sequence, remake the
network cable.
AP8082DN and AP8182DN
Hardware Installation and Maintenance Guide
6 Appendix
Issue 03 (2019-04-01) Copyright © Huawei Technologies Co., Ltd. 98