Sorry to post here as an extreme newbie... In the office part of my house, I have a nice (memorable) UK land-line number from BT that anyone who wants me will call - unless they call my mobile. I have an analogue phone (with headset port) connected to it, which I would like to emulate in any new set up. I don't have call waiting as the BT call waiting message is a bit cheesy, although of course whenever I am on the phone I never know if someone is trying to reach me. Nor do I have Caller-ID. I also have a second land-line from Virgin Media which I don't really use - although I have an extension from the office into the 'home' part of my house to give me a fixed phone in the house should I ever need it (my wife also uses this for home working sometimes). I also have a couple of Skype accounts, although I allowed my Skype numbers to lapse as I never really used them enough. I would like 3CX to do something like this... ...allow a call to come in on my BT number, but route(?) this to my Virgin line or VOIP line so that my BT number remains free for incoming and outgoing calls. I would also like Caller-ID and call waiting functions (would I need to buy these services from BT?). Plus it would be nice to have one of those fancy IP phones that have nice ring tones and extra functionality! I would like to be able to make a call from this phone on my desk without having to look at my PC. Clearly there are loads of other voicemail and forwarding options in 3CX which I am sure would be useful once I am up and running. So, I thought I would try installing 3CX to see if I could muddle my way through the installation - but I fell at the first post when asked to enter details for IP/FQDN/SIP Domain which had me stumped (nor do I currently have a static IP address from my ISP). The question is, would 3CX do what I want (and more) and make it worth investing the time to understand how to install and make it work - or should I just pay BT for caller ID and call waiting and get an answer-phone? I like to think I can keep up to date with technology, and that 3CX would unify and simplify my communications once I have it sorted - but is this too much for a beginner? One final question - if 3CX manages everything and the PC crashes - does everything just stop working? Many thanks for any thoughts or advice.