Freeway DSL User’s Manual
4.3.2 Advanced
Settings
These settings are only for more technically advanced users who have a sufficient knowledge
about wireless LAN. These settings should not be changed unless you know what effect the
changes will have on your AP.
Field Description
Authentication
Type
Used to specify the wireless authentication type which can be:
Open System
: Enables your client adapter, regardless of its WEP
settings, to attempt to authenticate and communicate with an access
point. Open Authentication is the default setting.
Shared Key
: Enables your client adapter to communicate only with
access points that have the same WEP key. This option is available
only if Use Static WEP Keys is selected.
Auto
: This allows either Open System or Shared Key authentication
to be used.
Fragment
Threshold
Defines the largest RF packet that the client adapter sends without
splitting the packet into two or more smaller fragments. If a single
fragment experiences interference during transmission, only that
fragment must be resent. Fragmentation generally reduces throughput
because the packet overhead for each fragment consumes a higher
portion of the RF bandwidth.
RTS
Threshold
Specifies the data packet size beyond which the low-level RF protocol
invokes RTS/CTS flow control. A small value causes RTS packets to be
sent more often, which consumes more of the available bandwidth and
reduces the throughput of other network packets. However, small values
help the system recover from interference or collisions, which can occur
in environments with obstructions or metallic surfaces that create
complex multipath signals.
Should you encounter inconsistent data flow, only minor reduction of the
default value, 2347, is recommended. If a network packet is smaller than
the preset RTS threshold size, the RTS/CTS mechanism will not be
enabled. The Router sends Request to Send (RTS) frames to a
particular receiving station and negotiates the sending of a data frame.
After receiving an RTS, the wireless station responds with a Clear to
Send (CTS) frame to acknowledge the right to begin transmission. The
RTS Threshold value should remain at its default value of 2347.
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