Cisco Systems XR 12416 Manuale di Installazione Scaricare il pdf (Pagina 4)

Chapter 1 Product Overview

Physical and Functional Description of Router

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Cisco XR 12416 Router Installation Guide

OL-13833-01

AC and DC Power Subsystems

A router ships with either an AC or DC powered system. Source power connects

to the power shelf at the back of the chassis which route power to the power

supplies, also referred to as power entry modules (PEMs).

Standard AC Power Shelf

The standard AC-input power subsystem consists of a single-level AC-input

power shelf that house three AC power supplies which supply full redundant

power to the router.

The power supplies participate in an N+1 redundant current-sharing scheme that

is divided among all three power supplies. If one power supply fails, the system

can continue to operate temporarily, (depending on your system configuration)

with the remaining two power supplies. Failed power supplies should be replaced

as soon as possible to ensure full redundancy.

Caution To ensure that the chassis configuration complies with the required power

budgets, use the on-line power calculator. Failure to properly verify the

configuration may result in an unpredictable state if one of the power units fails.

Contact your local sales representative for assistance.

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Cisco Systems XR 12416 Manuale di Installazione Pagina 4