Huawei OptiX OSN 8800 - 4.5.4 Fan and Heat Dissipation

OptiX OSN 8800/6800/3800
Hardware Description
4 OptiX OSN 8800 Subrack
Issue 01 (2016-03-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
81
Pin
Signal
Function
6
N C
Not connected
7
N C
Not connected
8
N C
Not connected
Table 4-53 Pin assignment of the TOD interface
Pin
Signal
Function
1
GND
Ground
2
GND
Ground
3
DCLS_IN0_N
1PPS negative
4
GND
Ground
5
GND
Ground
6
DCLS_IN0_P
1PPS positive
7
DCLS_OUT0_N
TOD negative
8
DCLS_OUT0_P
TOD positive
4.5.4 Fan and Heat Dissipation
Each OptiX OSN 8800 universal platform subrack has one fan tray assembly, which includes
eight independent fans and an air filter. The air filter can be drawn out and replaced.
Version Description
Only one functional version of the fan tray assembly is available, that is, TN18.
Functions and Features
Table 4-54 Functions of a fan tray assembly
Function
Description
Basic function
Dissipates the heat generated by an subrack so that the subrack can
operate normally within the designated temperature range.
Commissioning
control

Auto Speed Mode: Implements automatic fan speed regulation,
depending on the subrack temperature.

Adjustable Speed Mode: You can manually adjust the fan
speed.
Partitioned heat
dissipation
Each subrack is divided into four partitions to help provide
efficient heat dissipation. The fan speed in each partition is