I can`t entry at the router - Cnet CWR-854 Router

These aren't widely used in the United States, however it appears that there should be a small reset button on the back of the device. There may be a graphic of an arrow going into a circle above or near it. Press and HOLD that button for 15-20 seconds and then release. All of the lights will go on the router and then go off.
IMPORTANT: When you do this, all of the settings in the router will be cleared and it will go back to factory settings. The default username and password at that point are admin and admin.
You can then go to http://www.cnet.com.tw/html/Services.html to obtain an owners manual for the device and step you through setting it back up.
Hope this helps!