Help Netgear N600 Dual Band Router Wndr3400 for MTNL / Airtel

[nooty2007]

Hey guys i got MTNL and Airtel Broadband both .
How can i config this router i brought it from USA .

I Did try to put Name and password but it does not work .

http://www.netgear.com/home/products/wirelessrouters/high-performance/WNDR3400.aspx

This is the one .