Cisco Systems C819GUK9 Images Supported, CleanAir Technology, Dynamic Frequency Selection, LEDs

Chapter 3 Wireless Local Area Network

WLAN Features

AP802 Dual Radio contains two different types of wireless radio that can support connections on both 2.4 GHz used by 802.11b, 802.11g, and 802.11n and 5 GHz used by 802.11a and 802.11n.

With the dual-radio/dual-band IEEE 802.11n access point, the Cisco 819HGW and Cisco 819HWD ISRs offer a secure, integrated access point in a single device. The ISRs support both autonomous and unified modes and are backward compatible with 802.11a/b/g.

The routers support IEEE 802.11n draft 2.0 and use multiple-input, multiple-output (MIMO) technology that provides increased throughput, reliability, and predictability.

For complete information on how to configure wireless device and radio settings, see Basic Wireless Device Configuration and Configuring Radio Settings.

Images Supported

For the images supported in the AP802 Dual radio, see Minimum software version needed to support AP802.

CleanAir Technology

The CleanAir is a new wireless technology that intelligently avoids Radio Frequency (RF) to protect 802.11n performance. For more information, see Cisco CleanAir Technology. This feature is supported in all SKUs.

Dynamic Frequency Selection

The Dynamic Frequency Selection (DFS) is the process of detecting radar signals that must be protected against 802.11a interference and upon detection switching the 802.11a operating frequency to one that is not interfering with the radar systems. Transmit Power Control (TPC) is used to adapt the transmission power based on regulatory requirements and range information.

Note The DFS functionality is disabled for FCC SKUs pending FCC certification. For more information, see Dynamic Frequency Selection and IEEE 802.11h Transmit Power Control.

LEDs

The WLAN LED is located at the front panel of the router. Table 3-1describes the WLAN LED for the Cisco 819HGW and Cisco 819HWD ISRs.

Cisco 819 Series Integrated Services Routers Software Configuration Guide

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