Cisco ONS 15454 DWDM Installation And Operation Manual page 570

13.2 ONS 15454 ANSI Rack Installation
The ONS 15454 ANSI measures 18.5 inches (469.9 mm) high, 19 or 23 inches (482.6 or 584.2 mm) wide
(depending on which way the mounting ears are attached), and 12 inches (304.8 mm) deep. You can
install up to four ONS 15454 ANSIs in a seven-foot (2133.6 mm) equipment rack. 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 ANSI is installed underneath the shelf
assembly, the air ramp on top of the lower shelf assembly provides the air spacing needed and
should not be modified in any way.
A 10-Gbps-compatible shelf assembly (15454-SA-ANSI or 15454-SA-HD) and fan-tray assembly
Note
(15454-FTA3 or 15454-FTA3-T) are required if ONS 15454 ANSI 10-Gbps Cross-Connect (XC10G)
cards are installed in the shelf.
Warning The ONS 15454 ANSI should be installed in the lower rack position or mounted above another
ONS 15454 ANSI shelf assembly.
Warning The ONS 15454 ANSI must have 1 inch (25.4 mm) of airspace below the installed shelf assembly to
allow air flow to the fan intake. The air ramp (the angled piece of sheet metal on top of the shelf
assembly) provides this spacing and should not be modified in any way.
Cisco ONS 15454 DWDM Installation and Operations Guide, R4.7
13-4
Figure 13-1 shows the dimensions of the ONS 15454 ANSI.
Chapter 13 Shelf Hardware Reference
September 2004