MultiPart - 0870 010 7890. Manuals cost £5 and the service is pretty good.
www.dbtel.co.uk -- they
manufacture the phone for NTL and BT (Synergy Range) and carry 5 manuals on
the site. If you look at the Amethyst 640 manual and the NTL D4000, they appear
to be much the same in operation.