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Old 01-19-2012, 05:46 PM
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Default Will increasing the transmit power increase the range

I have two Cisco Aironet AP350 routers in Bridge mode. One is European spec set to 50mw (ie I can't set them to 100mw) and the master is US spec is set to 100mw. The AP's are 1 mile apart, clear line of sight across a valley. On a clear day I get a consistent, all be it slow, connection but when its raining the the connection constantly drops and then re-acquires.

When I have a good connection the log files has a lot of Warning and Info comments like these below:

2 days, 17:28:09 Info Deauthentication from 003458110c01, reason "Not Authenticated"
2 days, 17:28:09 Info Station 003458110c01 Authenticated
2 days, 17:28:09 Info Deauthentication from 003458110c01, reason "Not Authenticated"
2 days, 17:28:08 Warning Station 003458110c01 Failed Authentication, status "Unsupported Authentication Algorithm"
2 days, 17:28:08 Info Deauthentication from 003458110c01, reason "Not Authenticated"
2 days, 17:28:08 Warning Station 003458110c01 Failed Authentication, status "Unsupported Authentication Algorithm"
2 days, 17:28:00 Info Deauthentication from 003458110c01, reason "Not Authenticated"
2 days, 17:28:00 Info Station 003458110c01 Authenticated
2 days, 17:28:00 Info Deauthentication from 003458110c01, reason "Not Authenticated"

I do not know what these error messages mean but expect that they indicate that the routers are on the edge of their connection range.

I have the opportunity to buy another US spec Cisco Aironet AP350 router which would enable me to use 100mw transmission power, I wonder whether this would give me better range and if so to what extent. It would also be useful to know whether these error messages are due to the second AP not receiving info from the primary AP or the other way around, is there any way to tell?

Any comments on this would be very helpful

Last edited by macgd016; 01-19-2012 at 05:53 PM..
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Old 01-19-2012, 06:40 PM
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Not Authenticated means the password ain't working, or the security is in some way compromised

more power increases the distance at which the transceiver can be received, but not the distance the the transceiver can receive. more power is like shouting louder to a mute person and expecting to hear a reply.

antennas increase the ability of both the transmitter and receiver. better antenna, not more power

Last edited by Mark Oney; 02-11-2012 at 04:09 PM..
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Old 01-19-2012, 06:43 PM
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wrong thread
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Old 01-19-2012, 06:58 PM
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Hi Mark thanks for the reply. I understand what you are saying but I believe that the de-authorisation is being caused through poor signal, I can't really see any other reason as the link able appears to be connected ok and is fully usable.

So what I would really like to find out is which AP is not hearing well enough, any ideas how I can find this out?
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Old 01-23-2012, 06:29 PM
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Talking Power is useful. Antenna does not work well

Power is useful. Antenna does not work well
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Old 02-11-2012, 01:45 PM
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Quote:
Originally Posted by tc998 View Post
Power is useful. Antenna does not work well
OK I give in what do you mean?
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Old 02-11-2012, 04:05 PM
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1) ignore the fool

2) APs, routers, bridges have status pages that tell you signal strength, signal to noise ratios, et cetera. log in, find the status page, look for a received signal strength worse than -70 dbm
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Old 02-12-2012, 08:39 AM
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Quote:
Originally Posted by Mark Oney View Post
1) ignore the fool

2) APs, routers, bridges have status pages that tell you signal strength, signal to noise ratios, et cetera. log in, find the status page, look for a received signal strength worse than -70 dbm
Certainly most adaptors I have played with have this sort of info but none of the routers I have do which is a shame, if they did I would be able to look at both ends and see what was going on.
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Old 02-12-2012, 03:21 PM
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page 71 and 72

http://www.cisco.com/en/US/docs/wire...ide/BR350p.pdf
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Old 02-13-2012, 01:30 PM
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Quote:
Originally Posted by Mark Oney View Post
Mark, Many thanks pointing out the relevant part of this manual, I have down loaded it several times but hadnít noted the reference to signal strength in the Link Test. Even so signal strength is not that straightforward to find even when doing the Link Test but I found it in the end and it tells me everything I need to know so thanks again.
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