Foroptimal performance and compatibility, enable support for all channel widths. If configured for 40MHz only or 80MHz only, this setting prevents legacy devices that support only 20MHz from connecting to the AP. (Wireless) Mode. This setting controls the type of Wi-Fi devices (802.11a/b/g/n/ac) that can connect to the AP. Foran example of 20 MHz channel versus 40 MHz channel pair configuration, see "20 MHz and 40 MHz Static Channel Assignments" on page 157. If you do not want to use 40 Mhz operation, select the 40MHz intolerance checkbox to enable this feature. honor 40MHz intolerance. When enabled, the radio will stop using the 40 MHz channels if the 80211n "draft" devices began shipping in 2007, while second-generation 802.11n Wi-Fi routers have been shipping since 2009.The specification provides for either 20Mhz or 40Mhz channels. Anarrower channel has a higher signal-to-noise (SNR) ratio than a wider one. You lose 3dB of SNR every time you double the channel width. This is mostly irrelevant when you're in range (good SNR). But it will make a difference at the edge of coverage where your connection quality is limited by the SNR. AUpper. This 5 GHz frequency band has a range of Ghz. its channel numbers are 52, 56, 60 and 64 and are specified for indoor use. The B band can be used for indoor or Outdoor use and has contenders for the best 5ghz channel. The eleven channels number from 100 through 140 and have a frequency range of 5470-5725Ghz. Vay Tiền Nhanh Chỉ Cần Cmnd.

which is better bandwidth 20mhz or 40mhz