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Power options on Aironet 1240

Posted on 2008-11-02
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Last Modified: 2013-11-09
I recently purchased a Cisco 1240 aironet access point. The software running on it is version 12.4 (10b). When I boot the AP and after initiation it shutsdown the radios on it. From my reading this could be a power problem. I am using an ac_power adaptor. How do I configure the device to source power from the adopter and not from the ethernet link? It appears the radios shutdown because they are trying to get power from the ethernet power line. The error I get from the web interface is: all radios disabled due to insufficient inline power. upgrade inline power source or install power injector.
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Question by:anyirongo
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Expert Comment

by:rexxus
ID: 22865602
You need to configure both the switch the access point is connected to and the access point

On the switch you need to disconnect the cable, then enter the command "power inline never" command on the interface the AP is connected to.

Then follow the config steps at:

http://www.cisco.com/en/US/docs/wireless/access_point/1240/quick/guide/ap1240qs.html#wp38473
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Author Comment

by:anyirongo
ID: 22865816

Our network is not running cisco switches and they do not run inline power. What changes can I make on the access point configuration?
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Expert Comment

by:rexxus
ID: 22866051
In the system power settings section of the web based gui for the AP:

Select:

Power Settings: Power Negotiation selected

Power Injector: Unchecked
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Author Comment

by:anyirongo
ID: 22866450

I tried this option. The radios are still disabled
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Expert Comment

by:rexxus
ID: 22866619
Try the command:

AP(config)# no power inline negotiation prestandard source
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Author Comment

by:anyirongo
ID: 22866875

no its not worked. Any other options
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Accepted Solution

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rexxus earned 125 total points
ID: 22866903
last thing that I can think of

Disconnect the ethernet cable the remove the ac power adapter.

Console into the device and once console is set up, plug the ac power adapter back in and see if you get the same result.  If so I would tend to think a faulty power supply (may not be true but I'm running out of ideas)
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Author Comment

by:anyirongo
ID: 22867025

DO you think adding a cisco power injector would help? I am thinking of purchasing one
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Expert Comment

by:rexxus
ID: 22867039
If your ac adapater isn't working properly than yes I would consider the power injector as a valid replacement option
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