Broadband - phone line interaction

Can broadband and phone line signals interact at the exchange?
I am getting frequent disconnects on BB and slower speed, also noise on the phone line. Disconnecting the router stops the phone noise. This occurs even when using only the BT master socket and happens with 2 different routers and several microfilters.
Ken Joy

Very occasionally there can be a fault on the splitter card in the exchange. The more likely reason for your fault would be an HR (high resistance) fault on your line. You say you tested at the master socket, was this in the test point revealed by removing the sockets lower half ?

If so, then it's time to contact your broadband ISP, they will tell the line tests OK (most likely) and threaten with charges, but if you have done the above, then the engineer will clear the fault, you won't be charged, and all will be well again.

Good luck.

Master socket, or the test socket you get to by removing faceplate, at which point your extensions in the property should cease to function.

Sorry not to be specific, yes the router was plugged into the test socket after removing the plate. Thanks for your help.
Ken Joy