The Cisco 3500 series Aironet access points can analyze up to 20 different kinds of interference in the air, and automatically self-adjust themselves for optimal signal broadcast-- all without the intervention of an IT staff member.

From the Cisco product page:

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<p class="expanded-spacing">Simplify wireless  operations with:</p>

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	<li> Automatic interference mitigation for better reliability and       performance</li>
	<li> Remote troubleshooting for fast problem resolution       and less downtime</li>
	<li> Robust security with non-Wi-Fi detection for       off-channel rogues</li>
	<li> Policy enforcement with customizable alerts         to prohibit devices that interfere with the network</li>
</ul>
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<span class="content"><a href="http://www.cisco.com/en/US/products/ps10981/index.html">Check it out</a>
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