Cisco ONS 15454 Series Procedure Manual page 105

Chapter 1 Install the Cisco ONS 15454 Shelf Assembly
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 assembly to allow air flow to the fan intake. If a second
ONS 15454 ETSI is installed above a shelf assembly, 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 assembly to
allow air flow to the fan intake. If a second ONS 15454 is installed underneath a shelf assembly, the air
ramp on top of the bottom shelf assembly 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 assembly and the bottom of the ONS 15454. The third-party equipment
must not vent heat upward into the ONS 15454.
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 40A.
• The fuse rating for ANSI chassis must not exceed 30A.
Step 2 Mount the first shelf assembly in the bottom of the rack using the
Shelf Assembly in a Rack (One Person)" task on page 1-13
Shelf Assembly in a Rack (Two People)" task on page
78-19286-01
Required Tools and Equipment (ETSI)
"DLP-G678 Mount the ONS 15454
or the "DLP-G679 Mount the ONS 15454
1-15.
Cisco ONS 15454 DWDM Procedure Guide, Release 9.2
1-17