Try TCP instead of UDP
I am now successfully using sipdroid with gizmo to make VOIP calls over wifi.
When I first followed this guide:
http://iiordanov.blogspot.com/2009/07/sipdroid-gv-guava.html
it did not work, however. I kept having registration time out errors.
Then I changed the protocol from UDP to TCP in the SIP Account Settings page of Sipdroid and it worked.
I am now successfully using sipdroid with gizmo to make VOIP calls over wifi.
When I first followed this guide:
http://iiordanov.blogspot.com/2009/07/sipdroid-gv-guava.html
it did not work, however. I kept having registration time out errors.
Then I changed the protocol from UDP to TCP in the SIP Account Settings page of Sipdroid and it worked.