Why does this seem to be so hard? And, more to the point, why are VSPs (VoIP Service Providers) so unhelpful these days? I realise that this isn’t really FreePBX related, but hopefully by putting this here I may find someone who can help. I should point out, this is only relevant for an Australian VSP – I know pretty much all of the major US VSP’s let you do this. It’s only the Australian ones who don’t seem to be interested in helping out.
A couple of my clients are set up so that they receive calls via ISDN (BRI or PRI), and make calls via VoIP. This is a reasonably standard thing to do, offers the best redundancy and means that even if your internet connection is down you can still make and receive phone calls. OK, so it’ll cost them a bit more while it’s down, but it’ll still be working. Pretty much what a business wants.