Mounting Multiple Nodes; Air Deflector; Air Plenum - Cisco ONS 15454 Hardware Installation Manual

Mounting Multiple Nodes

Mounting Multiple Nodes
Most standard (ETS 300 119) ETSI 600 x 600 x 2200 mm or 600 x 300 x 2200 mm racks can hold seven
ONS 15454 M6 shelves, and a fuse and alarm panel. In an ETSI rack, the brackets are mounted only in the
front position.
The ONS 15454 M6 shelves can be mounted above each other without any space between the shelves. This
method of mounting does not restrict the air flow because the air vents are on either sides of the ONS 15454
M6 shelves.

Air Deflector

An air deflector is a sheet-metal part that is mounted on the ONS 15454 M6 shelf to orient the air flow in a
specific direction.
The air deflectors can be mounted in different positions to control the air flow:
• Front to Front— Only ETSI rack
• Front to Back— For ANSI and ETSI racks
• Front to Top— Only ETSI rack
In an ANSI rack, the air deflectors are mounted only on the 23-inch rack configuration.

Air Plenum

Air plenum orients the air flow in the front-to-back direction inside the equipment to be compliant with GR-63
issue 4 requirement.
The air plenum kit has two horizontal and two vertical air plenums. The air that flows from the front top inlet
and the front bottom inlet are channelized to the right vertical plenum, inside the equipment, and then to the
exhaust air channel towards the left vertical air plenum. The air flow is deflected by 90 degrees and exited
out in the rear end.
The following figure shows the air flow inside the cabinet.
Cisco ONS 15454 Hardware Installation Guide
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Installing the ONS 15454 M6 Shelf