ZyXEL Communications NBG5615 User Manual page 111

Table 37 Network > Wireless LAN 2.4G/5G > General (continued)
LABEL
Channel Selection
Auto Channel
Selection
Operating
Channel
Channel Width
802.11 Mode
NBG5615 User's Guide
DESCRIPTION
Set the operating frequency/channel depending on your particular region.
Select a channel from the drop-down list box. The options vary depending on the
frequency band and the country you are in.
Refer to the Connection Wizard chapter for more information on channels. This option is
only available if Auto Channel Selection is disabled.
Select this check box for the NBG5615 to automatically choose the channel with the least
interference. Deselect this check box if you wish to manually select the channel using the
Channel Selection field.
This displays the channel the NBG5615 is currently using.
Select the wireless channel width used by NBG5615.
A standard 20MHz channel offers transfer speeds of up to 144Mbps (2.4GHz) or 217Mbps
(5GHZ) whereas a 40MHz channel uses two standard channels and offers speeds of up to
300Mbps (2.4GHz) or 450Mbps (5GHZ).
Because not all devices support 40 MHz channels, select Auto 20/40MHz to allow the
NBG5615 to adjust the channel bandwidth automatically.
40MHz (channel bonding or dual channel) bonds two adjacent radio channels to increase
throughput. The wireless clients must also support 40 MHz. It is often better to use the 20
MHz setting in a location where the environment hinders the wireless signal.
Select 20MHz if you want to lessen radio interference with other wireless devices in your
neighborhood or the wireless clients do not support channel bonding.
If you are in the Wireless LAN 2.4G > General screen, you can select from the
following:
• 802.11b: allows either IEEE 802.11b or IEEE 802.11g compliant WLAN devices to
associate with the NBG5615. In this mode, all wireless devices can only transmit at
the data rates supported by IEEE 802.11b.
• 802.11g: allows IEEE 802.11g compliant WLAN devices to associate with the Device.
IEEE 802.11b compliant WLAN devices can associate with the NBG5615 only when
they use the short preamble type.
• 802.11bg: allows either IEEE 802.11b or IEEE 802.11g compliant WLAN devices to
associate with the NBG5615. The NBG5615 adjusts the transmission rate
automatically according to the wireless standard supported by the wireless devices.
• 802.11n: allows IEEE 802.11n compliant WLAN devices to associate with the
NBG5615. This can increase transmission rates, although IEEE 802.11b or IEEE
802.11g clients will not be able to connect to the NBG5615. I
• 802.11gn: allows either IEEE 802.11g or IEEE 802.11n compliant WLAN devices to
associate with the NBG5615. The transmission rate of your NBG5615 might be
reduced.
• 802.11 bgn: allows IEEE802.11b, IEEE802.11g and IEEE802.11n compliant WLAN
devices to associate with the NBG5615. The transmission rate of your NBG5615 might
be reduced.
If you are in the Wireless LAN 5G > General screen, you can select from the following:
• 802.11a: allows only IEEE 802.11a compliant WLAN devices to associate with the
NBG5615.
• 802.11an: allows both IEEE802.11n and IEEE802.11a compliant WLAN devices to
associate with the NBG5615. The transmission rate of your NBG5615 might be
reduced.
Chapter 12 Wireless LAN
111