Tyco Electronics 0-1591700-x, Product User Manual

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Wireless Access Point Model 0-1591700-x User Manual Page 27 of 33
802.11g Stations Only
To optimise throughput performance of mixed networks containing both IEEE802.11b and 802.11g
clients, then this control should be
Disabled by default. This mixed client mode delivers throughput
of up to 9Mbps. However if the network contains no IEEE802.11b clients, then setting this control
as
Enabled can significantly increase the throughput performance of any IEEE802.11g clients to
up to 25Mbps.
This selection is only needed if optimised throughput performance of mixed client types is required.
This mode is detailed in the IEEE802.11g standard.
Protection Mode
Whenever an IEEE802.11b client is present, then the IEEE802.11g clients and access point will
automatically enable a protection mode to prevent the higher speed 802.11g transmissions from
disrupting the slower 802.11b transmissions. This is achieved by automatic adjustment of
preambles, slot times etc to get the best performance of the client population. This control has
three options:-
•
Auto
•
Always
•
None
The Auto mode is the default mode and delivers good performance. The Always mode
permanently enables the protection mode and can impact throughput. The None mode
permanently disables the protection mode.
Protection Rate
This mode selects the protection rate from a pull-down list of 1, 2, 5,5 and 11Mbps. The default
value is 11Mbps.
Protection Type
This control manages the RTS and CTS relationships. There are two options:-
•
RTS-CTS
•
CTS-Only
RTS-CTS is the default mode. RTS is the equivalent of a reservation request sent by a device on
the network. CTS is the response to this request and informs the client device that the request has
been received and that it is permitted to send the data packet.
CTS-Only is used in mixed IEEE802.11b/g networks where there is provision for the access point
to send only the CTS packet. This is based on the CTS being sent without the need for it to be in
response to an RTS packet.
Note that these protection mechanisms adversely impact throughput but can deliver optimal
performance of mixed IEEE802.11b/g networks.
Short Slot Time
This value can be used to obtain slightly better throughput under high network loading conditions.
The default is
Enabled .
PL0356 ©2003TycoElectronics Issue 1