Huawei OptiX OSN 8800 T16 - Page 79

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8 Power Redundancy
T64 Subrack Power Redundancy
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Mutual backup DC input for area 2
Mutual backup DC input for area 1
Mutual backup DC input for area 4
Mutual backup DC input for area 3
Power distribution and redundancy for the enhanced OptiX OSN 8800 T64 subrack
Front Rear
Two PIU boards in hot backup mode supply power to one subrack at the same time. When one of the PIU boards becomes faulty,
the other PIU board continues to supply power to the subrack to ensure that the subrack can still function properly. Each area is
configured with a pair of power supplies in mutual backup.
• For the T64 Enhanced subrack, the PIU boards installed back-to-back are in mutual backup.
• For the T64 General, T32, and T16 subracks, PIU boards on the left and right sides are in mutual backup.
• For the universal platform subracks, the PIU boards are installed on the right side and the upper and lower PIU boards are in
mutual backup.
• For details of the backup relationships between PIU boards, see the "Power Redundancy" section.
CAUTION