IBM WRT-410 User Manual

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1.5 Wireless Performance 
The following information will help you utilizing the wireless performance, and operating coverage of 
WRT-410. 
1. Site selection 
To avoid interferences, please locate WRT-410 and wireless clients away from transformers, 
microwave ovens, heavy-duty motors, refrigerators, fluorescent lights, and other industrial 
equipments. Keep the number of walls, or ceilings between AP and clients as few as possible; 
otherwise the signal strength may be seriously reduced. Place WRT-410 in open space or add 
additional WAP-4000 as needed to improve the coverage. 
2. Environmental factors 
The wireless network is easily affected by many environmental factors. Every environment is 
unique with different obstacles, construction materials, weather, etc. It is hard to determine the 
exact operating range of WRT-410 in a specific location without testing. 
3. Antenna adjustment 
The bundled antenna of WRT-410 is adjustable. Firstly install the antenna pointing straight up, then 
smoothly adjust it if the radio signal strength is poor. But the signal reception is definitely weak in 
some certain areas, such as location right down the antenna. 
Moreover, the original antenna of WRT-410 can be replaced with other external antennas to extend 
the coverage. Please check the specification of the antenna you want to use, and make sure it can 
be used on WRT-410. 
4. WLAN type 
If WRT-410 is installed in an 802.11b and 802.11g mixed WLAN, its performance will reduced 
significantly. Because every 802.11g OFDM packet needs to be preceded by an RTS-CTS or CTS 
packet exchange that can be recognized by legacy 802.11b devices. This additional overhead 
lowers the speed. If there are no 802.11b devices connected, or if connections to all 802.11b 
devices are denied so that WRT-410 can operate in 11g-only mode, then its data rate should 
actually 54Mbps and 108Mbps in Super G mode.