@Sivamad2000
check this video
http://www.youtube.com/watch?v=ONxggaH6tmc&NR=1
or
Kindly see my signature link wa3002_g4 quick reference.
select link Chennai or MP Bsnl site.
Para two:
(a)
Only difference for AIRTEL ( and MOST Important)
select Line 1_32 VPI 1 and VCI 32 ( Advanced options WAn EDIT)
(b)
Add AirtelId/PW for PPPoE connection "Always On"
(c)
IN DNS select Obtain address automatically, or enter
google dns 8.8.8. 8 and opendns 208.67.220.220
(d)
if you intend to use additional systems
Enable DHCP ( In LAN page ) range say 192.168.1.3 to 192.168.1.10
(e)SAVE REBOOT in Management menu
Wait for 2 minutes.
Check wifi with without security keys.
Feedback.