Combine 802.11g and 802.11n network

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A customer of us wants to combine a 802.11g and 802.11n WiFi network.

A 802.11n AP can go up to 300 meters, a 802.11g can go up to 100 meters. What happens if a laptop with 802.11g card want to connect from 200 meters. Does this work or does the latop be in the range of 100 meters.

When I mesure the network based on the g standard, there might be some holes in covering the area for the 802.11n. What happens if a laptop with a 802.11n card is in this hole. Does the laptop go to the 802.11g standard? What happens if a laptop with 802.11n card connects on a 802.11n AP and walkes into an hole in de grid. Does the laptop switch to the 802.11g standard?

What happens if two laptops, one with the 802.11g and one with the 802.11n card connect to the same AP. Will the troughput for the 802.11n laptop be higher than the laptop with a 802.11g card or wil the AP downgrade to the 802.11g standard for both laptops?

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Scott Fella Sun, 03/01/2009 - 07:51
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This is the thing.... Cisco states that 802.11N is a one to one replacement. Sinal quality at a given distance is improved with 802.11n, but still has the same coverage area. There are alot of mixed environments out there and what you must realize is that you need to support the 802.11g clients so you need to make sure your site survey confirms that. There will be alot of improvements with 802.11N, but that is greenfield and all 802.11n compatible devices.... Yes it does help with 802.11g devices, but you will not get the same RSSI from a 802.11G @100 meters and 802.11N @300 meters. There is always timing issues when you have mixed environment, so yes the radio will throttle down to be able to support the 802.11g client.

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