normally a noise problem with your line. has your connection speed changed and/or noise margin increased?
if not check btspeedtester to see if profile changed
Does this show you anything compared to the other one?
your noise margin has increased and your connection speed has decreased. your profile will still probably be 750 and correct profile now down to 4000 based on current speed.
normal reason is some sort of noise on your line
Ive done the noise test on the phone, and no noise, what now?
check this post which has some ideas
if you keep having disconnections then contact the mods for assistance http://bt.custhelp.com/app/contact_email/c/4951
may take a few days for mods to get back to you
is this showing noise improvement?
your connection is just the same as last night but your noise margin is almost double - have you made any changes?