Allied Telesis AT-TQ Series, User Manual, Page: 52 / 174

Chapter 3: Manage Menu
52
Primary Channel Specifies the location of the Primary and
Secondary channels for the 802.11n and
802.11ac modes when operating with
channel widths of 40 and 80 MHz,
respectively.
The bandwidth of the 40 MHz channel for
the 802.11n modes is divided into two 20
MHz channels. The bandwidth of the 80
MHz channel for the 802.11ac modes is
divided into two 40 MHz channels. The
channels are contiguous in the frequency
domain. One of the channels is
designated as the Primary channel. This
channel is used by 802.11n or 802.11ac
clients that support only a 20 or 40 MHz
channel bandwidth, and for legacy clients.
The other half of the channel is
designated as the Secondary channel.
You may use this parameter to specify the
Primary channel of the 40 MHz bandwidth
for 802.11n nodes and 80 MHz bandwidth
for 802.11ac nodes.
- Upper: Designates the upper 20 or 40
MHz of the channel as the Primary
channel for the 802.11n or 802.11ac
mode, respectively.
- Lower: Designates the lower 20 or 40
MHz of the channel as the Primary
channel for the 802.11n or 802.11ac
mode, respectively. This is the default
setting.
Table 3. Modify Radio Settings Window (Continued)
Parameter Description