This morning I found out this example by Jean:
http://jeanderuelle.blogspot.com/2008/10/jain-sip-is-working-on-top-of-android.html
As soon as I saw the blog post I downloaded Andorid SDK and the example to check this with my own eyes 
.
Jean manage to run the NIST-SIP stack (a public domain implementation of standard JSIP API) and a complete SIP dialog setup and tear-down example on the Google Phone platform (alias Andorid).
What’s great about this achievement:
1) JSIP is a standard api that can now be used by developers to implement server-side and Andorid applications.
2) NIST-SIP is a stable implementation of the JSIP specification. So now google has a stable SIP stack by leveraging the OS path.
3) It’s quite straight-forward to port/run JSDK application on Andorid JVM and NIST-SIP is a great example not just marketing fluff.
Kudos to Jean and Google for the great stuff !
Francesco
Waldo said
So wait– how long until we have a SIP phone on Android?
(and how about aix2?)
W
framtech said
The working example right now is about the SIP Stack in order to have a working SIP Phone on Android a library to handle the media is still missing. For more info please check this discussion about possible solution and required work to have a SIP Phone implementation on top of Android: http://groups.google.com/group/mobicents-public/browse_thread/thread/e38fbdd874083d49?pli=1