| Summary: |
This document defines two new event packages for the SIP Events
architecture, along with two new data formats used in notifications
for those packages. The first is a call-leg package, and the second is
a conference package. The call-leg package allows users to subscribe
to another user, an receive notifications about the changes in state
of call legs that the user is involved in. The conference package
allows users to subscribe to a URL that is associated with a
conference. Notifications are sent about changes in the membership of
this conference, changes in active speaker, and media mixing
information. These general purpose packages can enable many new SIP
services, including single line extension, automatic callback,
unattended consultation-hold transfer, call park and pickup, and
IM-a-call.
|