Edimax Technology EW-7438RPn - Manual (Page 27)

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The description of every setup item is listed as follow:
Item Description
Fragment Threshold Set the Fragment threshold of wireless radio.
Threshold. Do not modify default value if you
don’t know what it is, default value is 2346.
RTS Threshold Set the RTS threshold of wireless radio. Do not
modify default value if you don’t know what it is,
default value is 2347.
Beacon Interval Set the beacon interval of wireless radio. Do not
modify default value if you don’t know what it is,
default value is 100.
DTIM Period Configures DTIM (Delivery Traffic Indication
Message) send period. Default value is 3.
Data Rate Select wireless data transfer speed. When you
select a value here, this repeater will refuse to
establish connection with wireless clients by
other speed.
It’s recommended to select ‘Auto’ and this
wireless repeater will adjust the speed
automatically.
N Data Rate Select wireless data transfer speed by MCS0 to
MCS7. MCS stands for Modulation and Coding
Scheme, which represents different speed when
bandwidth is 20MHz or 40MHz.
It’s recommended to select ‘Auto’ and this
wireless repeater will adjust the speed
automatically.
Channel Width Select the wireless channel width, 20MHz or
40MHz. 40MHz provides better network speed
for 802.11n wireless clients.
However, if there’re 802.11b / g clients
connecting to this wireless repeater, it will switch
to 20MHz mode automatically.
Preamble Type Set the type of preamble of wireless radio, Do not
modify default value if you don’t know what it is,