SIP subscribe notify publish forwarding

TSBC can forward SIP Subscribe, Notify and Publish messages between users and registrars (PBX).
Forwarding of these messages follow the same rules as forwarding of SIP registration.

SIP Subscribe overview

The SIP SUBSCRIBE method allows users to subscribe to various services, and get notified of events related to these services. Typical services (packages) that phones will register to are:

• Voice mail
• Presence
• Conference

Each user's device can register to various packages, then receive notifications for each of these package (independently).

SIP Subscribe/Publish forwarding

TSBC will forward SUBSCRIBE or PUBLISH requests from users to Registrar (PBX)

SIP Notify forwarding

TSBC will forward NOTIFY requests from Registrar (PBX) back to users.

References

• Understanding SIP Subscribe
• IANA SIP Event types