Connecting two IP phones to remote Asterisk

We’re opening a remote office and I’d like to attach two phones to the main office. I’m looking for guidance on how to get started connecting these two remote phones to our existing system.

My reading indicates the best way to do this is a VPN back to the main office, correct?

Does that create significant enough latency that I should be concerned?

Would it be better to also set up asterisk at the remote office and link them together?

  1. That’d remove a lot of room for errors that might be troublesome to solve.
  2. No, it wouldn’t.
  3. You’re probably better off tying the remote phones in; BLFs, single voicemail, etc.