Anyway, decided to contact BT. How? On my phone bill it gives a number for phone and another for broadband. But does that mean BT's own broadband service or any broadband problem over their phone lines?
They mean what they say. Contact your telephone provider
. If you're paying line rental to BT that means dialling 151. Do not
mention broadband. Mind you if their faults website can't see anything wrong it could be a bad idea trying to get Faults involved. You can get them to send an engineer but if they find nothing wrong you will be charged.
So my second question is, does anyone know for the sure the correct phone number for a slow broadband connection over a BT line when one's broadband ISP is not BT?
The correct initial contact is your ISP and in theory your ISP should then be able to deal with BT on your behalf. In practice the cheaper ISPs may try to fob this duty off onto the customer. It's annoying but that's how the bottom of the market survives. Mind you the 'not quite at the bottom' like Plusnet struggle to provide a decent customer service experience as well.
Anyway before getting an engineer out it'd probably be wise to go through some basic fault finding.
* If you are running your tests over wifi, use a wired connection instead.
* Make sure it's not a device on your network - turn off or unplug everything but the machine you are testing with.
* If fully wired connection still exhibits the issue does it happen at all hours or just peak hours?
* If the speed drop is constant connect your modem directly to the test socket ( http://btbusiness.custhelp.com/app/answers/detail/a_...
* Post your modem connection stats here ( http://www.kitz.co.uk/adsl/frogstats.php
Edited by Andrue (Thu 17-Dec-15 12:01:35)