What should I do if "WIRELESS" Icon is not appearing in the Admin configuration page of BSNL Modem?

I am having BSNL Broadband Connection. I want to connect my laptop to Broadband Connection through WI-FI connectivity. When I open 192.168.1.1 and login Modem Configuration Page with username "admin" & password "admin", icon for "Wireless" is not appearing in left margin of page. Please someone advice & help. What may be the problem?