Cisco ONS 15454 Hardware Installation Manual page 70

DLP-G680 Mount Multiple ONS 15454 Shelf Assemblies in a Rack
Note The ONS 15454 ETSI requires 616.5 mm (24.24 inch) minimum of vertical rack space and 25 mm (1 inch)
below the installed shelf to allow air flow to the fan intake. If a second ONS 15454 ETSI is installed above
a shelf, the air ramp between the shelves provides space for air flow. When using third-party equipment above
the ONS 15454 ETSI, provide a minimum of 25 mm (1 inch) between the third-party unit and the bottom of
the ONS 15454 ETSI. The third-party equipment must not vent heat upward into the ONS 15454 ETSI.
Note
The ONS 15454 ANSI must have one inch (25.4 mm) of airspace below the installed shelf to allow air flow
to the fan intake. If a second ONS 15454 is installed underneath a shelf, the air ramp on top of the bottom
shelf provides the desired space. However, if the ONS 15454 is installed above third-party equipment, you
must provide a minimum spacing of one inch (25.4 mm) between the third-party shelf and the bottom of the
ONS 15454. The third-party equipment must not vent heat upward into the ONS 15454.
Procedure
Step 1 Verify that the proper fuse and alarm panel has been installed in the top mounting space. If a fuse and alarm
panel is not present, you must install one according to manufacturer's instructions:
• (ETSI only) Verify that the fuse rating does not exceed 30A.
• The fuse rating for ANSI chassis must not exceed 30A.
Step 2 Mount the first shelf in the bottom of the rack using the
(One Person), on page 36
37.
The following figure shows a three-shelf ONS 15454 ETSI bay assembly.
Cisco ONS 15454 Hardware Installation Guide
40
or the DLP-G679 Mount the ONS 15454 Shelf in a Rack (Two People), on page
Installing the ONS 15454 M12 (ANSI and ETSI) Shelf
DLP-G678 Mount the ONS 15454 Shelf in a Rack