Cisco Catalyst 4500 Auxiliary Power Shelf Redundant Power Supply PWR-4502= 데이터 시트
제품 코드
PWR-4502=
Data Sheet
All contents are Copyright © 1992–2007 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 1 of 9
Cisco Catalyst 4500 E-Series Power-over-Ethernet
Capabilities and Power Supplies
Capabilities and Power Supplies
Power over Ethernet on the Cisco Catalyst 4500 E-Series Platform
The Cisco
®
Catalyst
®
4500 E-Series platform offers line cards, power supplies, and accessories
(including an AC power shelf) to support 15.4W per port simultaneously on every port in any fully
loaded Cisco Catalyst 4500 E-Series switch. Although all references to “Power over Ethernet”
(PoE), “inline power,” and “voice” power supply and line cards are synonymous, there are only two
versions: Cisco prestandard PoE and 802.3af-compliant PoE. Every Cisco Catalyst 4500 Series
chassis and PoE power supply supports the IEEE 802.3af standard and the Cisco prestandard
power implementation, helping ensure backward compatibility with existing Cisco powered
devices.
All Cisco Catalyst 4500 Series PoE line cards can distinguish an IEEE or Cisco prestandard
powered device from an unpowered network interface card (NIC) to help ensure that power is
applied only when an appropriate device is connected. With a Cisco PoE network, administrators
can depend on a robust network that is safe to deploy and simple to maintain.
PoE
PoE provides –48-VDC power over standard Category 5 unshielded twisted-pair (UTP) cable up to
100 meters when an IEEE 802.3 af-compliant or Cisco prestandard powered device is attached to
the PoE line-card port. Instead of requiring wall power, attached devices such as IP phones,
wireless base stations, video cameras, and other IEEE-compliant appliances can use power
provided from the Cisco Catalyst 4500 Series PoE line cards. This capability gives network
administrators centralized control over power and eliminates the need to install outlets in ceilings
and other out-of-the-way places where a powered device can be installed. When a switch is
connected to an uninterruptible-power-supply (UPS) system, network administrators can ensure
that power outages will not affect network availability.
Deploying PoE on the Cisco Catalyst 4500 E-Series
When the Cisco Catalyst 4500 E-Series is properly configured, implementing PoE is easy when
used with a Cisco powered device that supports Cisco Discovery Protocol. All Cisco Catalyst 4500
Series PoE line cards automatically detect an attached powered device the moment they are
installed. Moreover, the Cisco Catalyst 4500 Series returns unused port power to the system
power budget for use by other devices because it supports the IEEE802.3af optional power
classifications.
The Cisco Catalyst 4500 E-Series offers internal power supplies and external power devices for
multiple deployment scenarios, including small and large deployments in AC or DC environments
for data-only configurations, and scalability up to 15.4W per port for PoE configurations.
The Cisco Catalyst 4510R-E (10 slot), 4507R-E (7 slot), 4506-E (6 slot), and 4503-E (3 slot)
models as well as non-E-Series classic chassis share a common power-supply form factor. Each
Cisco Catalyst 4500 Series chassis is designed for 1 + 1 power protection while meeting the needs
of PoE demands. In addition to power resiliency, the Cisco Catalyst 4500 Series includes 1 + 1