Does CLI need to be enabled on an ADSL line? Looking at the service migration screen I see it asks for your CLI number. That's OK but on my 2nd line (the one I currently use for dial-up and the one I would use for ADSL) I have the CLI permanently supressed. (I get round the dial-up issue by prefixing the number with 1470). Would I need to get CLI re-enabled *before* asking for ADSL? TIA.
I think you'll find that you're asked for your CLI because PlusNet has to tell BT which line to enable ADSL on and lines are identified in the real world by their directory numbers (it's different inside the exchange but we won't go into that). Your line is connected to ADSL equipment called a DSLAM (don't ask!), so that's why your actual line must be identified. Once your line has been enabled, you get service by means of the userid passed by your ADSL modem (this is in the form username@plusnet, so you can guess how the exchange identifies your ISP & how your ISP knows who you are!). HTH