Allan Miller writes:
I seem to remember coming across a login/password on the net you could use
to
check that your connection was working but I haven't been able to find it again.
The username you're after is: bt_test@startup_domain
Any password will do (although I seem to recall that there does have to be something there other than blank).
Google on bt_test for more info.
Last time I saw this, the ISP had cut the customer off for non-payment of the service. The fault was with the ISP (they'd screwed up the direct debit), so its worth checking you have actually paid/been charged.