which ATA phone adaptors are freepbx/asterisk compatible?

which ATA phone adaptors will easily integrate with freepbx/asterisk to be used with a sip trunk ? brands and model please? for example will the linksys PAP2T-NA work? and what others?
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Kohana-3 for FreePBXv3
Are there any plans at the moment to upgrade the FreePBX core to Kohana-3?
Or is this just not on the roadmap?
Thanks