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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 1 Shelf and FMEC Hardware
1.1 Overview
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 SDH allows
access to the shelf assembly, fan-tray assembly, and cable-management 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 SDH 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
cable-management space.
All ONS 15454 SDH optical cards have SC connectors on the card faceplate, except the
STM-1SH 1310-8 card, which has LC connectors. Fiber-optic cables are routed into the front of the
optical and Ethernet cards. Electrical cards (E-1, E-3, DS3i, STM-1E) require FMEC cards to provide
the cable connection points for the shelf assembly.
The ONS 15454 SDH is powered using –48VDC power. Negative, return, and ground power terminals
are connected via the MIC-A/P and the MIC-C/T/P cards.
Note In this chapter, the terms “ONS 15454 SDH” 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 SDH refers to the entire system,
both hardware and software.
Install the ONS 15454 SDH in compliance with your local and national electrical codes:
• United States: National Fire Protection Association (NFPA) 70; United States National Electrical
Code
• Canada: Canadian Electrical Code, Part I, CSA C22.1
• Other countries: If local and national electrical codes, are not available, refer to IEC 364, Part 1
through Part 7.