Please follow the steps below:
1. login into the modem (Ip address: 192.168.1.254, No username and password needed)
2. Click Broadband Connection. if you see Disconnect button, click the Disconnect button. if NOT, go to step 3
3. Click View more…
4. Put your ADSL username in username edit box, Put your ADSL password in password edit box, Click Connect button