802.11 Standards for WLAN Communications
Wireless LANs must follow the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards that
define the protocols that govern all Ethernet-based wireless traffic. The Cisco Desktop Collaboration Experience
DX600 series supports the following standards:
•
802.11a: Uses the 5 GHz band that provides more channels and improved data rates by using OFDM
technology. Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC) support this
standard.
•
802.11b: Specifies the radio frequency (RF) of 2.4 Ghz for both transmitting and receiving data at lower
data rates (1, 2, 5.5, 11 Mbps).
•
802.11d: Enables access points to advertise their currently supported radio channels and transmit power
levels. The 802.11d enabled client then uses that information to determine the channels and powers to
use. The Cisco Desktop Collaboration Experience DX600 series device requires World mode (802.11d)
to determine which channels are legally allowed for any given country. For supported channels, see the
following table. Ensure that 802.11d is properly configured on the Cisco IOS Access Points or Cisco
Unified Wireless LAN Controller. For more information, see the
World Mode (802.11d), on page 76
and the
Cisco Desktop Collaboration Experience DX600 Series Wireless LAN Deployment Guide
.
•
802.11e: Defines a set of Quality of Service (QoS) enhancements for wireless LAN applications.
•
802.11g: Uses the same unlicensed 2.4 Ghz band as 802.11b, but extends the data rates to provide greater
performance by using Orthogonal Frequency Division Multiplexing (OFDM) technology. OFDM is a
physical-layer encoding technology for transmitting signals by using RF.
•
802.11h: 5 GHz spectrum and transmit power management. Provides DFS and TPC to the 802.11a Media
Access Control (MAC).
•
802.11i: Specifies security mechanisms for wireless networks.
•
802.11n: Uses the radio frequency of 2.4 GHz or 5 GHz for both transmitting and receiving data, and
enhances data transfer through the use of multiple input, multiple output (MIMO) technology, channel
bonding, and payload optimization.
Cisco Desktop Collaboration Experience DX600 series devices have a single antenna
and use the Single Input Single Output (SISO) system, which supports MCS 0 to MCS
7 data rates only (72 Mbps with 20 MHz channels and 150 Mbps 40 MHz channels).
Optionally, you can enable MCS 8 to MCS 15 if there are 802.11n clients utilizing
MIMO technology that can take advantage of those higher data rates.
Note
The following table lists the supported channels for Cisco Desktop Collaboration Experience DX600 series
devices.
Cisco Desktop Collaboration Experience DX650 Administration Guide, Release 10.1(1)
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WLAN Standards and Technologies
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