Airlink AWLH1201 - Manual (Page 18)

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Channel:
It shows radio channel numbers that used for WLAN networking.
The channel number can be set only under the Ad-Hoc operation
mode. In Ad-Hoc mode stations, each station must have the same
channel numbers and SSID.
In Infrastructure mode, the WLAN PCI Adapter will automatically
detect the channel number of the Access Point.
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SSID:
The SSID differentiates one WLAN group name from another; so all
access points and all devices attempting to connect to a specific
WLAN group name must use the same SSID. A device will not be
permitted to join the BSS unless it can provide the unique SSID.
If the SSID parameter is “ANY”, it will detect the strongest signal of
the wireless station.
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Data Rate:
You can choose one of the transmission rates as follows, 11Mbps,
5.5Mbps, 2Mbps, 1Mbps, and Auto. The Auto will automatically
detect the suitable linking transfer rate and auto fall back when the
signal is not too strong to transmit data, it will auto fall back from
11Mbps to 5.5Mbps, 2Mbps and 1 Mbps.
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Fragment Threshold:
Fragmentation Threshold is a way of transmitting the packets that will
be fragmented. Choose a setting within a range of 256 to 2432 bytes.
It is recommended to fragment the packet when the link quality is bad,
it is to prevent the wasting time of resending a long packet that is lost.