3.5 Best Effort NOTIFY (BENOTIFY) Extension Details

Session Initiation Protocol Extensions introduces a variant of the regular NOTIFY request that is known as Best Effort NOTIFY (BENOTIFY). The only difference between a BENOTIFY request and a NOTIFY request is that a BENOTIFY request is never responded to: the client never sends a SIP response to a BENOTIFY request, and the server ignores any response to a BENOTIFY request. The advantage of this approach is that it removes unneeded responses from the wire. The disadvantage is that information about the client request is subsequently unavailable.

Note This extension can be enabled independently or together with the batched SUBSCRIBE mechanism.

This extension is optional. An implementation MAY support it.