Ethernet LAN AT-WCP200G wireless problems

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Subject Author Date
AT-WCP200G wireless problems miksonx 02-13-06
Posted by on February 13, 2006, 12:46 pm
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Why the AT-WCP200G card can't work in mixed mode of B and G standards?
The network diagram is simple Linksys WRT54G connected to ADSL modem
and all
clients are with AT-WCP200G PCI cards.
If I put the Linksys WRT54G in one of the standards B or G in NOT MIXED
mode, all the clients are working ok with the windows software.
If I put the Linksys WRT54G in MIXED MODE of B and G standards then the
network is colised and it's can't work. The cards are trying to find
the
network sometimes they will find after refresh button and sometimes
they
will not find the network at all. If the card find the network then it
can't
connect to the network.

I try also to install the new software what I download from you web
site.
There woos nothing about SSID site survey button or something like
that.
After starting the software I get blue screen on the computer crash my
operating system. When I uninstall the software from the computer and
live
the drivers for the card in the system I woos able to get windows
working
and the problem stays with trouble finding networks in mixed mode of
AP's.

Is there any fix for this solution.


This is the response from Allied Telesyn

Hi Miroslav,

You can call our technical support line at 1-800-428-4835 ext3 and we
will be able to creat you a ticket and furthur assist you on your
question. Thank you and have a nice day.





Sincerely,

George Choe

Auto-Response (George Choe) 02/12/2006 09:09 AM
Response Appended


Posted by Albert Manfredi on February 16, 2006, 10:18 am
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miksonx@gmail.com wrote:
> Why the AT-WCP200G card can't work in mixed mode of B and G standards?
> The network diagram is simple Linksys WRT54G connected to ADSL modem
> and all
> clients are with AT-WCP200G PCI cards.

Maybe the clients and the Linksys don't quite agree as to how to
implement mixed mode. IEEE 802.11 is similar to coax Ethernet, in that
all clients, and the access point, see the same shared medium. This
sentence from IEEE 802.11g Clause 9.6 should probably raise a warning
flag about trying to run mixed mode:

"The algorithm for performing rate switching is beyond the scope of
this standard, but in order to ensure coexistence and interoperability
on multiratecapable PHYs, this standard defines a set of rules that
shall to be followed by all STAs."

If the details aren't in the standard, my first suspicion would be that
the various vendors who support mixed mode might not do so in precisely
the same manner.

Bert


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