Cisco ONS 15454 SDH E1-75 Manuale di riferimento - Pagina 2
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1.1 Overview
The ONS 15454 SDH is intended for installation in restricted access areas. A restricted access area
Warning
is where access can only be gained by service personnel through the use of a special tool, lock, key,
or other means of security. A restricted access area is controlled by the authority responsible for the
location.
The ONS 15454 SDH is suitable for mounting on concrete or other non-combustible surfaces only.
Warning
Unused card slots should be filled with a blank faceplate (Cisco P/N 15454E-BLANK). The blank
Caution
faceplate ensures proper airflow when operating the ONS 15454 SDH without the front door attached,
although Cisco recommends that the front door remain attached.
1.1 Overview
When installed in an equipment rack, the ONS 15454 SDH assembly is typically connected to a fuse and
alarm panel to provide centralized alarm connection points and distributed power for the
ONS 15454 SDH. 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 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.
Warning
Ultimate disposal of this product should be handled according to all national laws and regulations.
Warning
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.
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 and MXP_2.5_10G cards, which have LC connectors. Fiber-optic cables are routed
into the front of the optical and Ethernet cards. Electrical cards (E-1, E-3, DS-3i, 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.
Cisco ONS 15454 SDH Reference Manual, R4.6
1-2
Chapter 1
Shelf and FMEC Hardware
April 2008