SIP & IAX

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.

Useful Knowledge Base resources for SIP
Codecs Overview
SIP Response codes meaning
ISDN Cause codes meaning

🏁 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

SIP FAQ
How to choose between SIP Trunk, Registrar SIP, and IAX?
How to set up your first SIP trunk group?