Tenda 11AC - Page 69

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Parameter
Description
Channel
It specifies the operating channel of the AP. This parameter can be set if Channel Lockout is not
selected.

Auto: It indicates that the AP automatically adjusts its operating channel according to the ambient
environment.
Channel Bandwidth
It specifies the wireless channel bandwidth of the AP. This parameter can be set if the AP works in
802.11 b/g/n, 802.11ac, 802.11a/n mode and Channel Lockout is not selected.

20 MHz: It indicates that the AP can use only 20 MHz channel bandwidth.

40 MHz: It indicates that the AP uses 40 MHz channel bandwidth first, and changes to 20 MHz
channel bandwidth if severe channel competition occurs in the ambient environment.

20/40 MHz: It indicates that the AP automatically adjusts its channel bandwidth to 20 MHz or 40
MHz according to the ambient environment.
Extension Channel
It specifies the wireless expansion channel of the AP. This parameter can be set if the channel
bandwidth of the AP is set to 40 or 20/40 and Channel Lockout is not selected.
Lock Channel
It is used to lock the channel settings of the AP. If this parameter is selected, channel settings
including Country/Region, Network Mode, Channel, Channel Bandwidth, and Expansion Channel
cannot be changed.
Transmit Power
It specifies the transmit power of the AP.
A greater transmit power of the AP offers broader network coverage. You can slightly reduce the
transmit power to improve the wireless network performance and security.
Lock Power
It specifies whether the current transmit power settings of the AP can be changed. If it is selected,
the settings cannot be changed.
Preamble
A preamble is a group of bits located at the beginning of a packet to enable a receiver of the packet
to perform synchronization and prepare for receiving data.
By default, the Long Preamble option is selected for compatibility with old network adapters
installed on wireless clients. To achieve better synchronization performance of networks, you can
select the Short Preamble option.
Short GI
Short Guard Interval.
There is a delay on the receiving side due to multipath and other factors during the wireless signal
transmission in space. If the subsequent data block is transmitted too quickly, it will interfere with
the previous data block, and the short guard interval can be used to circumvent this interference.
Short GI helps to increase the wireless throughput by 10%.
Isolate SSID
It specifies whether to isolate the wireless clients connected to the AP with different SSIDs.

Disable: It indicates that the wireless clients connected to the AP with different SSIDs can
communicate with each other.

Enable: It indicates that the wireless clients connected to the AP with different SSID cannot
communicate with each other. This improves wireless network security.