In message , Steve Dulieu
writes

TEP = Train Equipment Panel
CDU = Cab Display Unit

Both perform essentially the same task, allow the driver to switch off
various bits of train equipment, but the TEP gave a much greater degree of
control. It had a button to cut out the rheo for one thing.

They still do, if you know where to find it, although it's not on the
CDU...
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)