If it is a ntl home Model 100 120 200 250 256 type in 192.168.100.1 password is root and root and look in modem configuration
Cable Modem Operation Configuration
Network Access : Allowed
Maximum Downstream Data Rate : 20480000
Maximum Upstream Data Rate : 768000
Mine is set up for 20 meg if i remember if it is not reg it goes to 100000 and 512000 this is how i knew a modem had not been reg or removed
