Unified Messaging using SIP and RTSP. Kundan Singh and Henning Schulzrinne, Columbia University. Agenda Introduction Requirements Architecture Issues Implementation Q/A. Dial 853-8119. Phone is ringing. Disconnect. Alice 939-7063. Bob 853-8119.
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Kundan Singh and
Henning Schulzrinne, Columbia University
Phone is ringing
.. The person is not available now
please leave a message ...
... Your voice message ...Traditional voice mail system
Bob can listen to his voice mails by dialing some number.
INVITE [email protected]
REGISTER [email protected]
INVITE [email protected]Architecture
The voice mail server registers with the SIP proxy, sipd, on behalf of every user.
Alice calls [email protected] through SIP proxy.
SIP proxy forks the request to Bob’s phone as well as to a voicemail server.
After 10 seconds vm contacts the
RTSP server for recording.
vm accepts the call.
Sipd cancels the other branch and ...
...accepts the call from Alice.
Now user message gets recorded
sipumConclusionWide range of applicability
Within a domain