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eliwil asked on

Cisco AIR-CB20A card compatible with Netgear WNHDE111 AP?

Before I buy another incompatible card....

Will the Cisco AIR-CB20A 5 GHz. 54 mbps Wireless Card PCMCIA 802.11a work with a Netgear WNHDE111 AP?

Wireless Hardware

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Darr247

8/22/2022 - Mon
Bembi

802.11a and 802.11b are common standards. So as far as all other options like encryption key lenght (WEP, WPA, WPA2) is fitting together, every card should work.

Nevertheless using several standards side by side may confuse the AP. So a/b and g standard may confuse with each other. There are dual channel APs around which should deal with that.  
ASKER
eliwil

the WNHDE111 is 5 ghz and not backwards compatible. I'm a newbie to wireless and my first pcmcia purchase was a 802.11n card at 2.4 ghz which did not work. I need to make sure I'm not making another newbie mistake, thus the question
 
ASKER CERTIFIED SOLUTION
Bembi

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Darr247

Bembi said:
>> It may be, that the cisco card works, as the AP also supports 802.11a, but why have you
>> bought a 300 MBit AP to connect with 5 Mbit to it?. The Cisco card supports 802.11g, but
>> not 802.11n, so they would fall back to 802.11a = 5 MBit.

So eliwil doesn't go on thinking 11a is half the speed of 11b... 802.11a is 54Mbps; it operates in the 5GHz U-NII band. 11a and 11b were both finalized in 1999.

Since 11g was backwards compatible with 11b and has about 3x the range when 11a is used on the 5GHz band's lower channels (because its lower 4 channels are power limited), even though it was released almost 4 years later it quickly became more-popular than 11a before people realized the U-NII band has 4x (in americas) to 6x (in europe) as many non-overlapping 20MHz-wide channels as the 2.4GHz ISM band.
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