Search http://www.dslreports.com/forum/voip
Or perhaps Google for "unlock" and your ATA model.
Dogface05 may have the skills to unlock it remotely for a fee.
Other possibility is if that model is not flashed to a vendor,
you might be able to factory reset it.
Google finds interesting things.
http://forum.voxilla.com/cisco-links...tml#post113266
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