NOTE
a. The width does not include the size of the attached mounting ear.
b. The height is 1 U (1 U = 1.75 inches, or about 44.45 mm), which is a height unit defined in
International Electrotechnical Commission (IEC) 60297 standards.
c. The measurement point of the temperature and humidity is 1.5 m above the floor and 0.4 m in front of
the cabinet without the front and the back doors.
d. The heat dissipation system allows the device to operate at the ambient temperature for a short time
as long as, at the time of failure, the system has not been operating continuously for more than 96 hours
and the accumulated operation time of the system per year does not exceed 15 days.
1.3 USG9520
The USG9520 has DC (4 U) and AC (5 U) chassis models. It employs an integrated chassis
and has 3 LPU/SPU slots. Its MPUs, power modules, and fans work in redundancy mode.
1.3.1 Device Overview
This section describes the appearance and hardware system features of the USG9520.
Appearance
The USG9520 has an integrated chassis and adopts a centralized routing engine and a
distributed forwarding architecture.
The USG9520 chassis have both AC and DC models.
the
Figure 1-30
DC chassis
HUAWEI USG9500 Series
Hardware Guide
1 Hardware Overview
Issue 03 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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