[Blind-sysadmins] accessible PBX?

Hello Everyone. I've spent the weekend tearing my hair out with free PBX. For some reason, I can't seem to get my dial plans right or to be able to make outgoing calls, probably because of the way I've entered something in the interface. Does anyone have any idea which system I could use as an alternative? I want something that's easy to administer, that isn't going to take hours and hours to set up and that essentially works without too much head scratching to work out where you've gone wrong, editing endless config files etc. If it could run on a raspberry Pi, all the better as I have a few lying around. I hope someone can shed some light. Cheers, Mo.