If the router has an RJ11 input then you have a DSL router with a built in Modem and do not need the separate DSL Modem, that can be discarded. Just connect the telephone cable to the RJ11 and follow the routers configuration instructions.
The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Purch hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.