Cheers both.

I'm building a picture of how I want our "new" phone system to work later in the year, so just collecting bits of feedback on what other people have. I'm happy to post what we're planning to do if anyone is particularly interested - as well as how we manage to put it together..!
As an aside, I'm trying not to overcomplicate it, as having worked on a development project for a telephony company a few years ago, there is always the tendency to think "And we could just..."!
