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Intel® Wi-Fi Products
Possible Interference by Other Wireless Devices May Impact 802.11n Performance

Knowledgebase Article

By IEEE definition of the 802.11n Standard, for the 2.4 GHz band there are only 3 non overlapping channels allowed for the North American Region, the channels are:

  • 1 (2402 MHz to 2422 MHz)
  • 6 (2427 MHz to 2447 MHz)
  • 11 (2452 MHz to 2472 MHz)

For 802.11n speeds to work on the 2.4GHz band there should be a 40 MHz “wide” channel centered on channel 6, which means that frequencies from 2417 MHz to 2457 MHz are used simultaneously, this is almost the entirely usable spectrum for 2.4 GHz.

This does not mean that older Wireless devices cannot operate in the presence of a new Wireless-N router.

To avoid interference and assure interoperability on the 2.4 GHz band with devices using 802.11b or 802.11g, the Standard defines that the router set on 802.11n must use “coexistence” algorithms to prevent the older wireless devices from being disconnected from their source (Router, Access point, peer-to peer connection, etc). These algorithms will force the 802.11n devices to “slow down” to 20 MHz channels momentarily, allowing the older devices to transmit and receive information.

Due to the existence of a large amount of wireless devices currently working on the 2.4 GHz band, which ranges from wireless cards to cordless phones, is highly probable that your router might encounter interference from neighboring wireless devices, therefore the speed of your connection might be affected.

Intel, as part of the WIFI Alliance is bound to be certified and compliant with the IEEE standard. The speeds obtained by our adapters are in accordance with the 802.11n Standard in regards of what is to be expected under normal conditions of Interference under the 2.4 GHz band.


Intel Knowledge Base Article Disclaimer

This applies to:

Intel® Centrino® Advanced-N + WiMAX 6250
Intel® Centrino® Advanced-N 6200
Intel® Centrino® Advanced-N 6205
Intel® Centrino® Advanced-N 6205 For Desktop
Intel® Centrino® Advanced-N 6230
Intel® Centrino® Advanced-N 6235
Intel® Centrino® Ultimate-N 6300
Intel® Centrino® Wireless-N + WiMAX 6150
Intel® Centrino® Wireless-N 100
Intel® Centrino® Wireless-N 1000
Intel® Centrino® Wireless-N 1030
Intel® Centrino® Wireless-N 105
Intel® Centrino® Wireless-N 130
Intel® Centrino® Wireless-N 135
Intel® Centrino® Wireless-N 2200
Intel® Centrino® Wireless-N 2200 For Desktop
Intel® Centrino® Wireless-N 2230
Intel® Dual Band Wireless-AC 3160
Intel® Dual Band Wireless-AC 7260
Intel® Dual Band Wireless-AC 7260 for Desktop
Intel® Dual Band Wireless-AC 8260
Intel® Dual Band Wireless-N 7260
Intel® Dual Band Wireless-N 7265
Intel® WiFi Link 1000
Intel® WiFi Link 5300 and Intel® WiFi Link 5100 products
Intel® WiMAX/WiFi Link 5350 and Intel® WiMAX/WiFi Link 5150 products
Intel® Wireless WiFi Link 4965AGN
Intel® Wireless-N 7260
Intel® Wireless-N 7265

Solution ID: CS-031509
Last Modified: 23-Aug-2015
Date Created: 01-Apr-2010
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