I’ve read a bit about the VoIP and use with ADSL but the hardware is very expensive. Is there anyway that you can get like a software “phone” and use a normal microphone? instead of paying £200 for a phone that does the same purpose.
It depends on how you are connecting. We use cable modems with a vpn tunnel back to the core network and softphones from that. We had some teething troubles but it seems to work ok