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OptiX OSN 8800/6800/3800
Hardware Description
Figure 4-35 Partitioned heat dissipation of the OptiX OSN 8800 universal platform subrack
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There are four areas (A, B, C, and D) in each subrack. The boards in the areas overlap and the
heat generated by the overlapped boards is dissipated to the two areas where they are located
so that the heat of the two areas is automatically regulated. Two fans in each area dissipate
heat generated by the boards in the area where the fans are located.
The fan tray assembly consists of ten fans and one fan control board.
functional blocks of the fan tray assembly.
Issue 01 (2016-03-10)
PWR CRIT MAJ
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Area A: houses service boards in slots IU1 to IU5.
Area B: houses service boards in slots IU5 to IU9.
Area C: houses service boards in slots IU9 to IU13.
Area D: houses service boards in slots IU13 to IU16 and PIU (DC power) / IU13 to IU15 and APIU
(AC power).
If any one of the ten fans in the fan tray assembly fails, the system can remain operational for a short
term in environments where temperatures range between 0° C to 40° C (32° F to 104° F). To ensure
long-term operation of the system, replace the fan tray assembly in a timely manner.
Short-term operation means that the continuous operating time does not exceed 96 hours and the
accumulated time per year does not exceed 15 days.
Replace the fan tray assembly immediately if two or more fans fail in the fan tray assemblies.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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4 OptiX OSN 8800 Subrack
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Fan Tray
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Assembly
Figure 4-36
shows the
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