[Freeswitch-users] SIP to make phone reboot or resync

HI All, Does anyone have an code that will cause Freeswitch to send a SIP message to a CISCO SPA5xx phone that will cause it to reboot or resync (aka re-provision)? I know about the URLs that cause the phone to do this, but they are NATed, so I need to use SIP to hit them. Assume I am programming language omni-lingual for this request! Thanks, Sean