It can run autonomous image:
http://www.cisco.com/en/US/partner/docs/wireless/access_point/ios/release/notes/15.2_2_JB.html#wp355908
1550 is supported on:
2500, 7500, 5508, WISM2 , ...etc
check the release notes of the controller code you have and you should be able to identify what is supported and what is not supported.
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