User's Guide

Chapter 11 Wireless LAN
EMG3435-Q20A User’s Guide
99
Channel Width Select the wireless channel width used by EMG3435-Q20A.
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). An IEEE 802.11ac-specific 80MHz channel offers speeds
of up to 1.3 Gbps.
The following are available only when you set Ba nd to 2.4G Hz.
Because not all devices support 40 MHz channels, select Auto 20/ 40MHz to allow the
EMG3435-Q20A 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.
The following are available only when you set Ba nd to 5G Hz.
Because not all devices support 40 MHz and/or 80 MHz channels, select Auto to allow the
EMG3435-Q20A to adjust the channel bandwidth automatically.
80+80MHz bonds two non-adjacent 80MHz channels to increase throughput. The wireless
clients may transmit/receive on both channels and use for the same purpose simultaneously.
40MHz (channel bonding or dual channel) bonds two adjacent radio channels to increase
throughput. A 80 MHz channel consists of two adjacent 40 MHz channels. The wireless clients
must also support 40 MHz or 80 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.
802.11 Mode If you set Ba nd to 2.4G Hz, you can select from the following:
• 802.11b: allows either IEEE 802.11b or IEEE 802.11g compliant WLAN devices to associate
with the EMG3435-Q20A. 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 EMG3435-Q20A 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 EMG3435-Q20A. The EMG3435-Q20A 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 EMG3435-
Q20A. This can increase transmission rates, although IEEE 802.11b or IEEE 802.11g clients will
not be able to connect to the EMG3435-Q20A.
• 802.11g n: allows either IEEE 802.11g or IEEE 802.11n compliant WLAN devices to associate
with the EMG3435-Q20A. The transmission rate of your EMG3435-Q20A might be reduced.
• 802.11 b g n: allows IEEE802.11b, IEEE802.11g and IEEE802.11n compliant WLAN devices to
associate with the EMG3435-Q20A. The transmission rate of your EMG3435-Q20A might be
reduced.
If you set Ba nd to 5G Hz, you can select from the following:
• 802.11a : allows only IEEE 802.11a compliant WLAN devices to associate with the EMG3435-
Q20A.
• 802.11a / a n: allows both IEEE802.11n and IEEE802.11a compliant WLAN devices to
associate with the EMG3435-Q20A. The transmission rate of your EMG3435-Q20A might be
reduced.
• 802.11a / a n/ a c : allows IEEE802.11n, IEEE802.11a and IEEE 802.11ac compliant WLAN
devices to associate with the EMG3435-Q20A.
Security
Table 27 Expert Mode > Wireless (continued)
LABEL DESCRIPTIO N