following Cisco WLAN products support the five interconnecting elements of the Cisco Unified Wireless Network and business-class WLANs:

Client devices: Cisco Compatible or Cisco Aironet client devices are strongly recommended for the Cisco Unified Wireless Network. With over 90 percent of shipping client devices certified as Cisco Compatible, almost any client device that you select should be Cisco Compatible certified. Cisco Compatible client devices interoperate with and support innovative and unique Cisco Unified Wireless Network features, such as fast secure roaming, integrated IPS, location services, and a variety of extensible authentication types.
Mobility platform: Cisco offers access points and bridges for the carpeted enterprise, ruggedized environments, and challenging environments like the outdoors. Cisco Aironet lightweight access points are dynamically configured and managed through LWAPP. Cisco Aironet autonomous access points that have been converted to operate as lightweight access points running the LWAPP are supported.
Network unification: The Cisco Unified Wireless Network leverages the customers’ existing wired network and investment in Cisco products. It supports a seamless network infrastructure across a range of platforms. Wired and wireless unification occurs with the Cisco Catalyst 6500 Series Wireless Services Module (WiSM), and with the 4400 and 2000 Series wireless LAN controllers.
World-class network management: Cisco delivers a world class network management system (NMS) that visualizes and helps secure your air space. Cisco WCS supports WLAN planning and design, RF management, location tracking, IPS, and WLAN systems configuration, monitoring, and management. This platform easily manages multiple controllers and their associated lightweight access points.
Unified advanced services: Cisco provides unified support of leading-edge applications. Cisco’s advanced services are industry-leading, innovative and comprehensive. The Cisco Unified Wireless Network advanced services are delivered by wireless lightweight access points, location appliances, and wireless IP phones.

Content 6.5 Implementing Wireless LANs 6.5.5 Aironet Access Points and Bridges Cisco offers different access points and bridges for different physical environments. In addition to lightweight and autonomous access points, Cisco has integrated access points into the ISR with either built-in or access point network modules, depending on the ISR model. All Cisco Aironet lightweight access points connect to Cisco Wireless LAN Controllers, so customers can mix-and-match access points within their network, yet still take advantage of all the rich Cisco Unified Wireless Network capabilities in an integrated manner. Autonomous access points are manageable via CiscoWorks WLSE or CiscoWorks WLSE Express. Cisco has products for the carpeted enterprise, ruggedized environments, and challenging environments such as the outdoors. For example:

Cisco Aironet 1130AG Series Access Point is for the carpeted enterprise that has little environmental variability and operates within a controlled environment.
Cisco Aironet 1240AG Series Access Point is for challenging environments that need a ruggedized enclosure, such as manufacturing, loading docks, and warehouses.
Cisco Aironet 1500 Lightweight Outdoor Mesh Access Point is for cost-effective, scalable deployment of secure outdoor WLANs for network connections within a campus area, outdoor infrastructure for mobile users, or public access for outdoor areas. The 1500 Series supports auto-configuring and self-healing wireless mesh deployments.
Cisco Aironet 1300 Series Outdoor Access Point/Bridge or Cisco Aironet 1400 Series Wireless Bridges offer high-speed, high-performance outdoor bridging for line-of-sight applications. They both have a ruggedized enclosure for harsh outdoor environments with extended operating temperature range. Both are available in an autonomous version only. Cisco Aironet 1300 Series Outdoor Access Point/Bridge can be deployed as an autonomous access point, bridge, or workgroup bridge. It has a ruggedized enclosure and provides high-speed and cost-effective wireless connectivity between multiple fixed or mobile networks and clients.

Content 6.5 Implementing Wireless LANs 6.5.6 Power over Ethernet To decrease the cost and complexity of the installation, the access points can be powered over an Ethernet cable, eliminating the need to run expensive AC power to remote access point installation locations. No electrician is required. Anyone qualified to run Category 5 cable can install the cabling required to power Cisco Aironet Access Points. The standard Category 5 cable requirements still apply (maximum 328 feet or 100 meters). Power Sourcing Equipment (PSE) can be switches, routers with switch modules, and power injectors. Powered devices (PDs) are access points and other devices. New PoE switches, such as the Catalyst 3560-24PS switch, can supply power of up to 15W per port. Up to 15W power is required for dual-mode access points. IEEE 802.3af and Cisco use different methods to detect when power is required. The first step is to detect that the device requires power. The second step is to classify power requirements. Cisco uses Cisco Discovery Protocol (CDP) in the PD to inform the switch about the amount of power used. Figure shows how power is transported over the Ethernet cable. PoE can be supplied over the following wires:

Ethernet pair 1,2 and 3,6
Ethernet pair 4,5 and 7,8

The IEEE 802.3af mandates that both methods have to be supported for PDs. Midspan power injectors add power to Ethernet cables between switches and devices. The spare pairs 4,5 and 7,8 are used, which requires 8-wire cabling. This technique does not extend the 100-meter Fast Ethernet cable limit. You cannot use this approach for 1000TX Gigabit Ethernet, which uses all eight wires, so no spares wires are available. Power can be supplied by the following PSEs:

Power injector
- AIR-PWRINJ3 / AIR-PWRINJ-FIB
Powering switch
- Cisco Catalyst 3560-PS
- Cisco Catalyst 3750-PS
- Cisco Express CE500-LC / CE500-PC
- Cisco Catalyst 4500 / 6500 switch with inline power line cards
- Router module NM-16ESW-PWR (Cisco Router Series 2600/2800/3600/3700/3800)
- Router card HWIC-4ESW-POE (Cisco Router 2800/3800)
- Router with PoE support (Cisco Router 1801/1811/1812)

ISRs need an optional power supply upgrade that supplies 48-volt power.

Cisco has shipped more than 18 million ports with PoE installed. New Cisco PSEs and PDs support both PoE methods: IEEE 802.3af and Cisco proprietary PoE

Following are examples of such Cisco devices:

Access points: Cisco Aironet 1131AG, Cisco Aironet 1242AG
Switches: Cisco Catalyst 3560 and 3750 Series
Router: Cisco 1812, HWIC-4ESW-POE

The devices automatically detect the supported PoE method; no configuration is required. Switch port configuration for PoE:

Enables and disables PoE
- Auto (default)
  - Power detection enabled
  - Power is supplied if required by device
- Never
  - Power disabled
  - Port shutdown turns power off

The show power inline command displays the configuration and statistics about the power drawn by connected PDs and the capacity of the power supply. The Catalyst Switch Device Manager displays the port status and the PoE statistics.

Content 6.5 Implementing Wireless LANs 6.5.7 Explaining WLAN Antennas Some knowledge of antennas is essential to understand wireless networks. It is important to know how to set up and optimize antennas for best