Common Network Cable Faults And Preventive Measures - Huawei AP8082DN Hardware Installation And Maintenance Manual

AP8082DN and AP8182DN
Hardware Installation and Maintenance Guide
----End

6.1.3.8 Common Network Cable Faults and Preventive Measures

Table 6-12
Table 6-12 Common network cable faults and preventive measures
Symptom
l The device cannot be
l The device restarts
l A large number of error
Issue 03 (2019-04-01)
lists common network cable faults and preventive measures.
powered using PoE.
frequently.
packets exist on the
device or services are
interrupted.
Copyright © Huawei Technologies Co., Ltd.
Cause
A network cable has high
resistance or is too long.
Non-standard network cable
connectors cause poor
contact with device
interfaces.
Wires in a network cable are
connected to wrong pins.
A network cable connector
is not crimped securely,
causing poor contact
between the network cable
and pins in the connector.
6 Appendix
Preventive Measure
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.
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.
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.
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.
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