Figure - Cisco ONS 15454 DWDM Installation And Operation Manual

Chapter 15 Shelf Hardware Reference
15.2 ONS 15454 ANSI Rack Installation
access to the shelf assembly, fan-tray assembly, and fiber-storage area. The FMEC cover at the top of the
shelf allows access to power connectors, external alarms and controls, timing input and output, and craft
interface terminals.
You can mount the ONS 15454 ETSI in an ETSI rack. The shelf assembly weighs approximately 26 kg
(57 pounds) with no cards installed. The shelf assembly includes a front door and a Front Mount
Electrical Connection (FMEC) cover for added security, a fan tray module for cooling, and extensive
fiber-storage space.
The ONS 15454 ETSI is powered using –48 VDC power. Negative, return, and ground power terminals
are connected via the MIC-A/P and the MIC-C/T/P FMECs.
15.2 ONS 15454 ANSI Rack Installation
The ONS 15454 ANSI is mounted in a 19- or 23-in. (482.6- or 584.2-mm) equipment rack. The shelf
assembly projects five inches (127 mm) from the front of the rack. It mounts in both Electronic Industries
Alliance (EIA) standard and Telcordia-standard racks. The shelf assembly is a total of 17 inches (431.8
mm) wide with no mounting ears attached. Ring runs are not provided by Cisco and might hinder
side-by-side installation of shelves where space is limited.
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.

Figure 15-1

shows the dimensions of the ONS 15454 ANSI.
Note A 10-Gbps-compatible shelf assembly (15454-SA-ANSI or 15454-SA-HD) and fan-tray assembly
(15454-FTA3 or 15454-FTA3-T) are required if ONS 15454 ANSI 10-Gbps Cross-Connect (XC10G)
cards are installed in the shelf.
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
15-3
September 2005