How to setup a PBX system

Guys, would it be possible to install a PBX on a server?.. or would that require root access?.. If possible, could some one explain, please?. Thanks in advance.

What you’re looking for is probably Asterisk.

It’s not on-topic for our forum, though, so I’m closing this.

Also, in the future please use descriptive titles like, “How to setup a PBX system” instead of a generic and meaningless title like “Technical Question” (technical question about what? most posts here are questions and most questions here are “technical”).