Chapter 440 SpaceLink Access PointChapter 4 - Wireless PerformanceThe IEEE 802.11b specification supports four data rates: 11 Mbps, 5.5 Mbps,2 Mbps, and 1 Mbps. Operation at 1 Mbps provides greater range thanoperation at 11 Mbps. The SpaceLink Access Point will automatically adjustthe data rate to maintain a usable radio connection.Therefore, a client that is close to the SpaceLink Access Point may operateat 11 Mbps while a client that is on the fringe of coverage may operate at 1Mbps. As mentioned earlier, you can configure the data rates that theSpaceLink Access Point will use. Note that if you limit the range of datarates available to the SpaceLink Access Point, you may reduce the effectivewireless range of the SpaceLink 802.11b products.External antenna options are available for the SpaceLink Access Point thatcan increase the product’s range. Contact your reseller for more information.External Antenna PlacementProper antenna placement can help improve communication range. Hereare some guidelines:An external omnidirectional antenna for the SpaceLink Access Pointshould be placed in a vertical position. It can be mounted upside downto the ceiling or a beam.Place the antenna as high as possible. In an office environment, try toplace it above cubicle walls.Do not place a metal (like a filing cabinet) between two antennas.Two antennas that are communicating should be in the same plane. Forexample, do not lie one antenna on its side and have its partner standingupright.Note: Optional antenna kits are not currently available. Check withyour local dealer for availability.