Cutting off a customer to sustain connect speeds? No idea what you mean care to elaborate?
Checking with ethernet cable something ISP support should have covered already, also is this ADSL2+ service, or a hangover from when they did Powerline trials?
If ADSL then get the router stats form the modem at usual location and test socket.
As I said, I'd heard, perhaps from an unreliable source! -something about during peak times isp's cut/restrict internet connections to manage all their customers overall connection? i dont understand it all.
sorry, i dont know how to check whether it is adsl2+ service?
also, im not really sure what details are helpful...but here is a list of some, as well as the two files of a speed test and the first page on the router...
channel06 2437MHz channel 6
WPA group update timer-3600 seconds
adsl mode- auto sync up
annex type-ANNEX A/L/M
obtain an IP address automatically-enabled
thanks for your interest in helping