Cisco WS-X4908-10GE= - 10 Gigabit EN half-card Expansion Module Installation Guide download pdf (Page 14)

Chapter 1 Product Overview

Switch Components

1-14

Cisco Catalyst 4900M Switch Installation Guide

78-18350-01

A redundant power supply can be identified and diagnosed by a running system

regardless of its input status. AC and DC supplies are interchangeable.

Power Management Modes

The Catalyst 4900M switch supports the redundant power management mode. In

this mode, if both power supplies are operating normally, each provides from

20/80 to 45/55 percent of the total system power requirements at all times. If one

power supply fails, the other unit increases power to 100 percent of the total power

requirement.

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Cisco WS-X4908-10GE= - 10 Gigabit EN half-card Expansion Module Installation Guide Page 14