1. Internet Real-Time Laboratory demonstration
Internet multimedia services
(Internet telephony and multimedia communication)
Prof. Henning Schulzrinne
Students: Kundan Singh, Xiaotao Wu, Ajay Nambi

2. SIP-based architecture
Single Box
(Netra)
Telephone
7040
SIP/PSTN Gateway
Department
PBX
switch
713x
rtspd
sipum
Quicktime
RTSP clients
RTSP
sipconf
Configuration
Web server
SQL
database
sipd
7134,wenyu
Xiaotaow
7135, sank
NetMeeting
siph323
H.323

3. Programmable call routing
For example, Priority, time-of-day, caller identification
Urgent
sipd
Normal
Voic
Scripts
Low-priority
Reject and
Notify using

4. Conferencing Netmeeting sipconf e*phone Web configuration Audio mixing
Video replication
SIP, PSTN or H.323
sipc
sipconf
e*phone
SIP/PSTN

5. Device control DO sip:lamp@cs.columbia.edu SIP/2.0 ….. <Control>
<Action>turn lamp on</Action>
</Control>
lamp
serial port
X10 device

6. Video device INVITE sip:monitor@cs.columbia.edu

7. Voicemail SIP/RTSP based unified messaging
voice mail, answering machine, web based setup, and web integration.

8. SIP based VoiceXML browser
VoiceXML is a language for specifying voice dialogs for interactive voice response (IVR) systems.
PSTN
SIP user agent
SIP/PSTN gateway
Web server
CGI, servlet, JSP
SIP based VoiceXML browser
SIP phone
            
Media server
Call Request
Fetch VoiceXML pages
Get streaming media
Press 1 to listen to next message,
2 to forward …

9. Summary SIP-based architecture Heterogeneous endpoints
Telephone, SIP phone, H.323
Devices like lamp, video encoder
Advanced services
Programmable call routing, voice mail, interactive voice response
Multimedia collaboration
Synchronous: conference, IM
Offline: discussion board, voic , file sharing