We currently have a 6x16 analogue PBX with 4 analogue lines, we want more call capacity and smaller bills (doesn't everybody?).
VOIP and broadband aren't perfect, so we want to keep a couple of analogue lines in case of trouble. We want to keep the business number for dialling in, over VOIP and analogue. We want the business number to appear at the other end whether we're dialling out over VOIP or analogue.
We've a spare server to run whatever (CentOS/Linux, Asterisk, Trixbox?) on. We'll buy a handful of VOIP phones but probably want some FXS ports too.
I'm comfortable with CentOS etc, but who do we go to for the service and hardware, or can anyone recommend a consultant in Edinburgh, UK?