on 27-04-2011 9h10
on 27-04-2011 20h29
Hi and welcome.
By what you are saying by swapping the phone back to the binatone it does look to be a fault on the 4100.
Just to make sure, any ADSL filters that you have plugged into the 4100 have you changed them out as well?
I suggest you take the phone back to the point of sale.