Hi,
Use the link below to reset the password on your router.
Once you are back on you can default the router with
YOURROUTER#erase start
YOURROUTER#reload
http://www.cisco.com/c/en/us/support/docs/routers/3800-series-integrated-services-routers/112058-c1900-pwd-rec-00.html
Regards
Alex
Regards,
Alex.
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