Huawei OptiX OSN 8800 Hardware Description page 63

OptiX OSN 8800/6800/3800
Hardware Description
Table 4-41 FAN speed mode
FAN Speed
Mode
Auto Speed Mode Fan speed in each partition is regulated automatically according to the
Adjustable Speed
Mode
Each OptiX OSN 8800 T16 subrack is divided into five partitions in terms of heat dissipation.
The subrack adopts one fan tray assembly to implement partitioned heat dissipation. See
Figure
Figure 4-24 Partitioned heat dissipation of the OptiX OSN 8800 T16 subrack
IU
1
In the OptiX OSN 8800 T16, there are five partitions (A, B, C, D, and E) in each subrack.
Two fans in each partition dissipate heat generated by the boards in the partition where the
fans reside.
Issue 01 (2016-03-10)
Description
temperature of the boards in the partition where the fans are installed.
Lower than 25° C (77° F): the fans run at low speed.

Higher than 45° C (113° F): the fans run at high speed.

25° C to 45° C (77° F to 113° F): The fans automatically adjust their

rotation speeds. This mode can reduce noise and is power-saving.
Fan speed in each partition is independently regulated.
The fans run at full speed if the speed regulating signals are abnormal.
If one of the fans in each partition fails, the other fan runs at full
speed.
Five fan speed modes are available: Low Speed, Medium-Low
Speed, Medium Speed, Medium-High Speed, and High Speed. You
can set the fan speed manually. In Adjustable Speed Mode, the fans in
all partitions run at the same speed and do not support the partitioned
manual fan speed adjustment.
4-24.
IU19 IU20 IU21
EFI PIU AUX
IU IU IU IU IU IU
2 3 4 5 6 7
A B
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
IU22
IU9 IU10
IU
IU IU
8
11 12
C D
4 OptiX OSN 8800 Subrack
IU23 IU24
PIU ATE
IU IU IU
IU IU IU
15 17 18
13 14 16
E
Fan tray
assembly
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