USRobotics USR5430 - Manuel (Page 11)

9
Radio
Use the Radio menu to enable and disable wireless signal transmission. If you want to shut down
the signal of your unit (disconnect from the wireless network), select
Radio Off.
Channel
802.11b and 802.11g use channels to limit interference from other devices. If you are experienc-
ing interference with another 2.4Ghz device such as a baby monitor, security alarm, or cordless
phone, change the channel on your USR5430 as well as your wireless router. The channel feature
will be used mostly in Ad Hoc Mode. In Client Mode, the USR5430 automatically switches the
channel to match the one from the wireless router or access point.
54g Mode
If you are having difficulty connecting to an 802.11b wireless only router, try switching your
USR5430 to 802.11b only mode and do the same with your wireless router. This will ensure you
are connecting to 802.11b devices only. Set the mode to 54g Auto for the widest compatibility.
Set the mode to 54g Performance for the fastest performance among 54g certified equipment.
54g Protection
The 802.11g standards provide a protection method so 802.11g and 802.11b devices can co-exist
in the same network without “speaking” at the same time. Do not disable 54g Protection if there
is a possibility that a 802.11b device may need to use your wireless network. In Auto Mode, the
wireless device will use RTS/CTS to improve 802.11g performance in mixed 802.11g/802.11b net-
works. Turn protection off to maximize 802.11g throughput under most conditions.
54g+ (Xpress)
54g+ is a technology that utilizes standards based on framebursting to achieve higher through-
put. With 54g+ enabled, aggregate throughput (the sum of the individual throughput speeds of
each client on the network) can improve by up to 25% in 802.11g only networks and up to 75% in
mixed networks comprised of 802.11g and 802.11b equipment.
Rate
You may force a lower data rate if you are having trouble getting connected or losing data at a
higher rate. It is important to know that some data rates belong only to one 802.11 standard but
not the other which will force your USR5430 to connect to only that network.
802.11g rates; 6, 9, 12, 18, 24, 36, 48, 54 Mbps
802.11b rates: 1, 2, 5.5, 11 Mbps
Basic Rate Set:
You have the option of supporting all rates as listed in the Rate section above or using the 1, 2
Mbps rates which will support only older 802.11b implementations.
Fragmentation Threshold
This threshold is used to fragment packets which help improve performance in the presence of RF
interference.
RTS Threshold (Request to Send Threshold)
The RTS threshold determines the packet size of a transmission and, through the use of an access
point, helps control traffic flow.
R24.0459.00 5430 US Fr Can .book Page 9 Wednesday, February 25, 2004 4:43 PM