Draytek VIGOR2925 SERIES User Manual page 511

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Guard Interval

Aggregation MSDU

Long Preamble

Packet-OVERDRIVE

capability. Such channel can increase the performance for

data transit.

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 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.

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.

This feature can enhance the performance in data

transmission about 40%* more (by checking Tx Burst). It

is active only when both sides of Access Point and Station

(in wireless client) invoke this function at the same time.

That is, the wireless client must support this feature and

invoke the function, too.

Note: Vigor N61 wireless adapter supports this function.

Therefore, you can use and install it into your PC for

matching with Packet-OVERDRIVE (refer to the following

picture of Vigor N61 wireless utility window, choose

Enable for TxBURST on the tab of Option).

Note: * means the real transmission rate depends on the

environment of the network.

Set the power percentage for transmission signal of access

point. The greater the value is, the higher intensity of the

signal will be.

Vigor2925 Series User's Guide