I got airtel broadband few days back.
It has a Binatone DT850W ADSL Modem+router. This dt850w has very weak wifi signal, doesn't reach 1st floor with strong signal.
I have an old D-Link DIR-600M wifi router (came with Hathway internet).
So I want to disable dt850w's wifi, and share the internet from dt850w to dir600m and use the 2nd's wifi only.

this is what I want to do::

[Binatone DT850W(wifi off)]--->------RJ45----->------[D-Link DIR600m]---wifi---))))

How to proceed? Please I need suggestions of you guys.