1. OpenSIPS Presence Project Atul Tambe tambe.at@husky.neu.edu Hitesh Thavnani thavnani.h@husky.neu.edu Amit Rindhe rindhe.a@husky.neu.edu Madhusudhan ananderikandadai.m@husky.neu.edu Anurag Band band.a@husky.neu.edu Mentor: Harshith Somaya Guidance: Elliot Eichen

2. GOAL To implement a context aware infrastructure using presence server with the help of XCAP to create centralized presence information exchange for client status notification application.

3. OpenSIPS presence server User agent – 1. Jitsi 2. Pidgin

4. Implementation XCAP Presence Server XCAP protocol for XML An XCAP server used by XCAP clients Buddy lists Presence policy PUBLISH, SUBSCRIBE and NOTIFY methods to provide a complete SIP server solution Receiving and handling Presence subscriptions from UA. Receiving and aggregating Presence data from the PUAs. Composing the Presence status from the fragments of presence data. Notifying all subscribed UAs when the Presence status of a Presentity in which they are interested changes.

5. PRESENTITY AND CALL FLOW

6. DATABASE TABLE

7. Features Vision VoIP Presence information Video Call Instant Messaging  Saves $ as internal communication is free  Management and control by system administrator Academic institutional communicator  File transfer  Video chatting

8. SUMMARY Cost Effective Security Flexibility Reliability