When 802.11b devices are sharing the same SSID as 802.11g devices they are brought down to the lowest common denominator data rate which is 11 Mbps.
This is a shared medium so if you have a lot of devices connecting to the access point or you need better speeds look at moving the b devices to their own SSID.
Too many or too few access points Updated firmware will have bug fixes, newer standards and other enhancements that will help clients work better with access points and vice versa.
The directional antenna would be a better choice aimed at the ground to create a cone of coverage and not a floating donut up in the air.
As you can see there are a lot of factors to include when thinking about deploying wireless in a warehouse space.The CIASF was founded as the Industrial Association of Dade County (IADC) in 1980 as an organization of business leaders involved in development, design, construction, sales, and the leasing of industrial warehouses and commercial properties in South Florida.In 2006, the organization changed its name to CIASF to reflect it’s desire to better serve both the commercial and industrial segments of the market. However, all along there were closer access points for it to associate to that would have provided a more optimal connection. Maxing out the power levels on the access points is not a solution to poor coverage or poor performance. By cranking the power level to full a situation is created where a client can actually “see” an access point that may be on the far side of the warehouse. Older client firmware on wireless adapters very often exhibits “sticky client” behavior where it will associate to an access point and hold on to that association until that signal is gone.