SIP Authentication

SIP Authentication is a stateless challenge-based mechanism which ensure user's identity. Authentication challenged can be asked for Invite and Bye methods.

TelcoBridges and SIP Aunthentication

TelcoBridges can handle SIP Authentication differently according to your network

• IP to IP calls (FreeSBC)
• TDM to IP calls (Tmedia)

FreeSBC

In the case of IP to IP calls, the challenge messages are forwarded between the SIP device and authentication server.

Invite callflow:

Bye callflow:

Configuration

The default configuration will forward challenge messages

Tmedia

In the case of TDM to IP calls, the authentication needs to respond to the authentication challenges. Invite callflow:

Bye callflow:

References

• voip-info.org