As far as I am aware it is possible to reconfigure the device from the command line.
However, as I have not even got as far as soldering a set of header-pins onto the PCB of a
/r device, I have not experimented with attempts to reconfigure one for an ADSL service.
There are a number of (somewhat interlocking) forum threads concerning the
ECI B-FOCuS CPEs. It might be best if you were to review all the information that is currently available and then discuss your requirements with those people who have practical experience of the device.