open source FreePBX Setup on PRI Line

I already have a CentOS-based server fitted with a working PRI/E1 card and a clear set of inbound and outbound call rules. What I need now is a clean FreePBX (Asterisk) installation, fully integrated with that PRI circuit, and ready for day-to-day use.

Here’s the scope in plain terms:

• Install and configure the latest stable FreePBX/Asterisk stack on the existing Linux server.
• Tie the PRI span into DAHDI so calls flow reliably both ways.
• Implement my pre-defined call routing: incoming numbers must ring the correct extensions and outbound permissions should follow the rules I provide.
• Provision ten softphones right away—eight on desktop (SIP or PJSIP) and two on Android—so they register securely and can place/receive calls over the PRI.
• Hand over a brief set of admin notes: how to add a new extension, adjust a route, or pull basic CDR reports.

I’ll supply the dial-plan spreadsheet, extension list, and any SIP credentials you need as soon as we start. Once everything passes live-call testing on all ten endpoints, the project is complete.