Was surfing for routers and came across these two brands D-Link and TP Link that could be a boon for
traders who have internet issues. These have three inputs, you could connect your ADSL line RG11(MTNL OR BSNL), or
connect your cable connection-RG45, or your USB Dongle as standby, thus you have continous internet should the other fail.
Amazon and Flipkart have these, cost is approx 2000/-
TP-Link: TD-W8968 N300 Wireless ADSL2+ Router
D-Link: DSL-2750U Wireless Router
There could be other brands too, please check, if interested.
Please do read on these, also read the reviews, regarding the wireless coverage, cause what works for Tom, may not work for Harry