# FreedomBox/Manual/Repro

## SIP Server (repro)

repro is a server for SIP, a standard that enables Voice-over-IP calls. A desktop or mobile SIP client is required to use repro.

### How to set up the SIP server

1. Configure the domain at /repro/domains.html on the FreedomBox.

   - Repro Domains

2. Add users at /repro/addUser.html.

   - Repro Users

3. Disable and re-enable the repro application in Plinth.

### Port Forwarding

If your FreedomBox is behind a router, you will need to set up port forwarding on your router. You should forward the following ports for repro:

- TCP 5060

- TCP 5061

- UDP 5060

- UDP 5061

Information |  |  | Support | Work Space |  | Reports | Promote
Overview | Hardware |  | Live Help | Where To Start | Translate | Calls | Talks
Features | Vision |  | Q&A | Design | To Do | Metrics | Press
Download | Manual |  | Use cases | Code | Contributors | Releases | Blog