Find resources to help you install, configure and diagnostic your SIP trunking, IAX or Registrar SIP service as well as answers to VoIP frequently asked questions.

📚 SIP Resources

This section includes useful information for anyone setting up or maintaining VoIP setups such as the meaning of SIP & ISDN codes.

🏁 Getting Started with SIP and IAX

Get started with CALLR SIP: choose an implementation suiting your needs and find answer to the frequently asked questions