Hi Leslie, the power adapter is 12 volt, 1 amp. The unit has a 1 year warranty for fan and power adapters. This means you may call the support center and request a replacement if you have owned the unit for less than 1 year.
Here are the telephone numbers by country;
http://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html
-Tom
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-Tom
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