Vigor2920 Series User’s Guide
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This page allows users to set advanced settings such as operation mode, channel bandwidth,
guard interval, and aggregation MSDU for wireless data transmission.
Available settings are explained as follows:
Item Description
Operation Mode
Mixed Mode – the router can transmit data with the ways
supported in both 802.11a/b/g and 802.11n standards.
However, the entire wireless transmission will be slowed down
if 802.11g or 802.11b wireless client is connected.
Green Field – to get the highest throughput, please choose
such mode. Such mode can make the data transmission
happening between 11n systems only. In addition, it does not
have protection mechanism to avoid the conflict with
neighboring devices of 802.11a/b/g.
Channel Bandwidth
20- the router will use 20Mhz for data transmission and
receiving between the AP and the stations.
20/40 – the router will use 20Mhz or 40Mhz for data
transmission and receiving according to the station capability.
Such channel can increase the performance for data transit.
Guard Interval
It is to assure the safety of propagation delays and reflections
for the sensitive digital data. If you choose auto as guard
interval, the AP router will choose short guard interval
(increasing the wireless performance) or long guard interval
for data transmit based on the station capability.
Aggregation MSDU
Aggregation MSDU can
combine frames with different
sizes. It is used for improving MAC layer’s performance for
some brand’s clients. The default setting is Enable.
Long Preamble
This option is to define the length of the sync field in an
802.11 packet. Most modern wireless network uses short
preamble with 56 bit sync field instead of long preamble with
128 bit sync field. However, some original 11b wireless
network devices only support long preamble. Click Enable to
use Long Preamble if needed to communicate with this kind
of devices.
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