FTTP LUMS fault at local exchange

[#1]

Can anyone tell me what LUMS stands for. OpenReach have been telling us that there is a LUMS fault at our local exchange which is not letting the fibre modem connect.
Your help desk is baffled by this acronym!

Peter Trinder

[#2]

Looks like this has been resolved for you now? Sorry that I didn't respond to your PM.
Matty

[#3]

Matty, all is great here today. Just configured the Airport Express on PlusNet and added in my other Airports!
Found this website which lists a vast number of BT acronyms and defines LLUMS
http://www.btglossary.co.uk/index.php?title=Main_Page
Hope everyone here will find this a useful asset.
Once again thanks for you and your colleagues patience during the setup. Feel free to contact if you need any data for the trial.
Kind regards Peter Trinder

[#4]

One thing was I had to uncheck IPv4 in the Apple AirPort Extreme setup. The Airport Utility flagged this up as a problem and there was a simple switch to disable it. Then I got green lights all around.