Teracom modem local access unable to configure

I have purchased a new bsnl broadband connection of wireless network with teracom modem model: T2-B-Gawv1.4U10Y-BI . I tried to configure it but was not able to and it gives error when I try to connect to internet with my computer . It gives me dns error and connection terminates . Please help me to configure it

To configure teracom modem model: T2-B-Gawv1.4U10Y-BI use the following data Username: admin, Password: admin, Router access page: 192.168.1.1, Wireless Settings: Open Authentication, Mac Filter: Disabled, Supported ADSL Modulation: ADSL2,2+, G.dmt,.lite, etc. Time zone: INST, DNS servers: BSNL + Open DNS [Will fasten up your browsing speed, DNS Relay: BSNL + Google.

To configure folow steps :

1. Open backup and restore and select browse button select the file and click on restore . To configure internet connection select configure internet connection .
2. Internet connection configuration window add new connection and click on edit button, configure atm pvc and click on next , configure connection and click on next .
3. Configure WAP IP select auto obtain button and check the enable NAT and add default route and click on next and then insert the above details and click on Apply button . This configures router to internet .
4. To configure wifi , select wireless network and hide SSID and set MAC address to white list and add your devices mac address .

Try using your own Username and Password so that there is no error .