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Cisco ONS 15454 Reference Manual, R7.0
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Chapter 1 Shelf and Backplane Hardware
1.1 1.1 Overview
Caution Unused card slots should be filled with a detectable filler card (Cisco P/N 15454-FILLER) or a
non-detectable filler card (Cisco P/N 15454-BLANK). The filler card ensures proper airflow when
operating the ONS 15454 without the front door attached, although Cisco recommends that the front
door remain attached.
Note The ONS 15454 is designed to comply with Telcordia GR-1089-CORE Type 2 and Type 4. Install and
operate the ONS 15454 only in environments that do not expose wiring or cabling to the outside plant.
Acceptable applications include Central Office Environments (COEs), Electronic Equipment Enclosures
(EEEs), Controlled Environment Vaults (CEVs), huts, and Customer Premise Environments (CPEs).
Note The Cisco ONS 15454 assembly is intended for use with telecommunications equipment only.
Note You can search for cross-referenced Cisco part numbers and CLEI (Common Language Equipment
Identification) codes at the following link: http://www.cisco.com/cgi-bin/front.x/clei/code_search.cgi.
1.1 Overview
When installed in an equipment rack, the ONS 15454 assembly is typically connected to a fuse and alarm
panel to provide centralized alarm connection points and distributed power for the ONS 15454. Fuse and
alarm panels are third-party equipment and are not described in this documentation. If you are unsure
about the requirements or specifications for a fuse and alarm panel, consult the user documentation for
the related equipment. The front door of the ONS 15454 allows access to the shelf assembly, fan-tray
assembly, and cable-management area. The backplanes provide access to alarm contacts, external
interface contacts, power terminals, and BNC/SMB connectors.
You can mount the ONS 15454 in a 19- or 23-inch rack (482.6 or 584.2 mm). The shelf assembly weighs
approximately 55 pounds (24.94 kg) with no cards installed. The shelf assembly includes a front door
for added security, a fan tray module for cooling, and extensive cable-management space.
ONS 15454 optical cards have SC and LC connectors on the card faceplate. Fiber-optic cables are routed
into the front of the destination cards. Electrical cards (DS-1, DS-3, DS3XM, and EC-1) require
electrical interface assemblies (EIAs) to provide the cable connection points for the shelf assembly. In
most cases, EIAs are ordered with the ONS 15454 and come preinstalled on the backplane. See the
“1.5 Electrical Interface Assemblies” section on page 1-14 for more information about the EIAs.
The ONS 15454 is powered using –48 VDC power. Negative, return, and ground power terminals are
accessible on the backplane.
Note In this chapter, the terms “ONS 15454” and “shelf assembly” are used interchangeably. In the
installation context, these terms have the same meaning. Otherwise, shelf assembly refers to the physical
steel enclosure that holds cards and connects power, and ONS 15454 refers to the entire system, both
hardware and software.
Install the ONS 15454 in compliance with your local and national electrical codes: