nemofish wrote:
We have two rooms seperated by about 60m within a large complex. I
have recently run a telephone extention cable between the two rooms
and now need to buy a couple of phones but I'm not sure which kind to
get. I need to be able to accept calls in both rooms and have the
ability to transfer a call between the two phones. I also need to
have an answerphone facility on one of the phones.

Can anyone advise on what type of phones will meet my requirements?

http://www.asterisk.org will do it for you.