Cisco 4507R - Catalyst Switch Datasheet - Page 3

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Data Sheet

Figure 1.

TwinGig Module

Cisco Catalyst 4500 E-Series and Classic Power over Ethernet Line Cards

The Cisco Catalyst 4500 Series offers line cards, power supplies, and accessories required to

deploy and operate a standards-based PoE internetwork. PoE provides –48 VDC power over

standard Category 5 unshielded twisted-pair (UTP) cable up to 100 meters when an IEEE 802.3af-

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.

Although all references to "PoE," "inline power," and "voice" power supplies and line cards are

synonymous, there are currently only two versions: Cisco prestandard and IEEE 802.3af

compliant. 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 devices powered by Cisco. All IEEE 802.3af-compliant line cards can

distinguish an IEEE or Cisco prestandard powered device from an unpowered network interface

card (NIC), helping ensure power is applied only when an appropriate device is connected.

Cisco Catalyst 4500 Classic Fast Ethernet and Gigabit Line Cards

The Cisco Catalyst 4500 Series offers a variety of classic Fast Ethernet and Gigabit Ethernet line

cards that include fiber and copper interfaces optimized for desktops, branch office backbones,

and servers for enterprise and commercial switching solutions, and service provider metropolitan

Ethernet networks. Gigabit Ethernet line cards include cost-effective, high-performance

1000BASE-X gigabit interface converter (GBIC) and SFP-based Gigabit Ethernet line cards and

the high-density 10/100/1000BASE-T triple-speed autosensing, autonegotiating Gigabit Ethernet

line cards. Fast Ethernet line cards include various densities of wire-speed 10/100, 100-FX,

100BASE-LX10, and 100BASE-BX-D options.

Features and Benefits

Functionally Transparent

Cisco Catalyst 4500 Series switches offers an extensive line of modules that support numerous

speeds and physical media combinations. These line cards are functionally transparent; all the

packet processing, queuing, buffering, and QoS occur in the supervisor engine. To that end, both

classic and E-Series line cards acquire the features and capabilities of the installed supervisor

engine. For example, a classic line card previously deployed with a classic supervisor engine using

4 queues per port will automatically have capability for 8 queues per port (first half CY2008) if

redeployed with a Supervisor Engine 6-E. This architecture enables customers to easily upgrade

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