Modem used in bridge mode on a line with OVH router behind (he who is the PPP authentication [PPOA, PPOE ... etc] not the modem that is just him an ATM ADSL filter). Everything works perfectly. For the commentary Yann, for the record, it is absolutely free unbundled modem-router and yet it is not said that it works perfectly well. For non-IP unbundled ADSL modem that is provided you have the router that goes well or have a modem router directly.
Cheap simple does the job being asked are: modem points.