"Office" side of things has cable broadband, an MS Small Business Server & a web server. Cabling is 100mbps and wifi.
What I'd like to do is:-
1) Use 3cx
2) have the "system" answer either of the pstn lines and route to the appropriate hanset (ie business to business, & private to private) but be able to transfer the call between handsets.
3) Allow any handset to dial out over VOIP
4) Accept incoming VOIP calls (not essential)
5) Voicemail & some kind of integration with the Exchange side of the SBS - not sure what but it's shiny & I want it
I'm confused as to what hardware I need - can someone help? The more I read the more the FXO/FXS thing confuses me. I'm happy to replace the existing alanlogue phones with IP ones.

