Go here...
http://dg834gt.mognuts.com/NetgearRouterUtility.html
Click Get detailed modem statistics
It may ask you to log in to your router (deafult user admin - password sky)
Follow the instructions to download the cfg file.
Open the file in notepad, on the fourth line down it'll tell you what mode you're on.
Pipex -> Zen -> UKFSN -> Sky LLU
.