I just purchased a Grandstream IP phone for the shack and I'm looking for a couple of things:

1) If there's a PBX out there that I might have an extension on for testing/training?

2) If there's a recent HOWTO on getting a PBX installed and running on a Raspberry Pi WITHOUT using the entire card.  (I have a Pi already up that I'd like to use.)

Thanks, and Cheers -