How to get the IP address of a new stream?

Can anyone tell me how to get the IP address from which a newly detected RTP stream is being sent, especially when a NewReceiveStreamEvent is posted? Or, is it possible to do so?
Thanks in advance.

My RTPConnector follows the example from the JMF home page here: http://java.sun.com/products/java-media/jmf/2.1.1/solutions/RTPConnector.html
I have not done any measurement regarding the performance of my RTPConnector implementation compare to that of the default but I did find some way to deal with the bursty nature of the default RTP transmission which caused some problem with 3rd party apps that don't handle jitter well. I created a 20ms timer that acts as a gatekeeper that allows the transmitter to send RTP packets. Unfortunately Java timers aren't very precise.
I also improved upon (I think I did anyway) the efficiency of the default (IBM) ULaw encoder as discussed here: http://forum.java.sun.com/thread.jspa?threadID=597011
My problems with performance issues were mainly in the speed at which processors and players are created and realized on slower PC's.

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