User bandiphani
Without looking at any specific models, I can tell you that Dataone will work with any
ADSL modem. There is no such thing as 'Dataone compatible'
ADSL modem or anything, BSNL made up the different types (Type1, Type 3) just to simplify the things for its own workforce.
BSNL Dataone is an ADSL2+ service, any ADSL2+ modem in which you can plug in the telephone line and somehow connect to the computer at other end will work. Wired or wireless. So all these latest modems that you find on
Asus,
Netgear websites will work. Add
D-Link to the list as well.
If it says ADSL2+ or G.dmt or G.992.5 dmt somewhere in the specification sheet, stay assured it will work with BSNL Dataone.
Have you purchased the modem from BSNL or leased/rented? The reason being, if you have purchased you do not need wireless ADSL modem+
router, you can keep that and just buy a plain wireless router.
So dataone comes through to through the ADSL modem, goes to your new fancy wireless router and then to your computer. IIRC the aftermarket firmware is for routers and not modem+router models, but you might search their forums before pulling the trigger.
To decide on specific model, compare the feature/specification sets and see what fits your requirement. Every case is a bit different. What are your requirements...present and future....only you can decide.