The procedure for testing a crossover cable is the same as that for testing a straight-through
cable except for the sequence in which the indicators turn on. For that sequence, refer to
crossover cable wire connections.
The Ethernet cable is qualified if the indicators turn on in the following sequence:
On the tester's master panel (on the left), the indicators turn on in the sequence 1-8-G. On the
tester's slave panel (on the right), the indicators turn on in the sequence 3-6-1-4-5-2-7-8-G.
If the indicators do not turn on in those sequences, the Ethernet cable is unqualified.
NOTE
If a tester is not available, use a multimeter to perform a simple test, as shown in
.
Figure A-72
Testing the connection of an Ethernet cable with a multimeter
----End
A.3 Environmental Requirements for Device Running
This section describes the environment requirements for device running, including the
requirements for the equipment room environment and power supply conditions.
A.3.1 Equipment Room Site Requirements
Telecom equipment should run in a suitable environment. When designing a project, consider
the communication network planning and the technical requirements of the equipment.
Consider hydrographic, geological, seismic, power supply, and transportation factors.
An equipment room's physical construction and layout, heating and ventilation, power supply,
lighting, and fire protection measures should be designed by specialists according to the
device's environment requirements. The equipment room should also conform to relevant
industrial, environmental, fire, and civil air defense regulations, including those set forth by
the state.
HUAWEI USG9500 Series
Hardware Guide
A Appendix
Issue 03 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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