Remote Monitoring via SIP
Presented by...
SIPKnowledge, Inc. 
Motivation:
It is 9pm. Joe Was trying to get hold of his house mate, Gracie, all day long, but with no luck. He is away from home and just about ready to go to the big party with his friends. If he could only detect her coming back home, he would be able to let her know where he is. Possibly invite her to join him and his friends at the party...
Feature:
Activation time
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Joe accesses his SIP based home presence-monitor system via his SIP mobile device. He remotely activates the monitor (via SIP commands).
Action time
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Gracie enters home. The home presence-monitor system alerts Joe right away for a movement at the apartment. Via the remote monitor Joe can view Gracie’s smiley face. He pushes a button on his phone, which opens two way audio channel between Joe and the phone, which is attached to the monitor. He asks Gracie to join them at the party.
How this can be accomplished:
The following scheme illustrates how this can be accomplished.

SIPKnowledge, Inc. 
SIPKnowledge pursue research combined with actual product (and standard) work and provide its outcome in a shape of self paced eLearning courses, seminars (on-site training) and actual products. The courses and seminars offer information/self-training on SIP, IP telephony (VoIP) and 3G IMS. Products include:
- Consulting
- SIP/IMS training courses
1. SIP Illustrated - SIP eLearning course
2. 3G IMS Illustrated - 3G IMS eLearning course
- SIP developers aid tools
1. SIP RFC (3261) navigator and clarifier tool
http://www.sipcenter.com/goto/sipcenter-sipknowledge
SIPKnowledge Mini Tutorials Series
4. Remote Monitoring via SIP
3. SIP Call Redirection
2. SIP Silent Rejection Service
1. Personal/Selective Presence with SIP Presence and XML directives