Exeter is my old University actually so its good to see they have steered clear of the 0870 scam.
They may also use Keycom as a telecoms supplier but I think they have probably agreed a different deal where geographic phone numbers are still used.
Clearly Keycom offered your university a normal geographic phone numbers deal too but your university decided to go for the scamming 0870 numbers because Keycom charged them less money for the telephone installation and ongoing maintenance etc, etc.
You may find this document of interest:-
http://www.ja.net/latest/news/2003/voicetraffic.htmlYou should submit an FOI request to your University asking for full details of the proposals submitted by Ofcom including whether these included a geographic phone numbers option. Even if Keycom are routing the calls to your rooms using a voip system you can still have geographic voip phone numbers - see
www.sipgate.co.ukApart from making life hard for the university with questions your only work around is probably using a service like
www.voipbuster.co.uk which lets you call any geographic uk phone number for free. Or as a last resort you could get Skype although they charge you to call geographic phone numbers unlike voipbuster