All i know using cms and ie u can reset the setting
but before i forgot my password and can't enter i remove the button battery for about 30min. then put it back all setting is reset and my password was reset to blank password and user name is Admin maybe 10 attempt failed to enter the login screen u need to wait 30-60min. before u can try your password.
Thx,but problem is that cms cannot connect to dvr, I don't know why.I can see dvr in router,web page of dvr works,but login no,login failed always.Any method to reset by hardware?