I have a SIP account setup & enabled. I also have skype, msn, gtalk.

When I boot up the device all of the accounts usually connect just fine, and if network connection is lost and regained they all reconnect pretty reliably.

Except the sip account.

About 50% of the time it reports "authentication failed". Yet if I click on the account, disable/enable & hit ok it always reconnects just fine.

I've used the same account from a PC and it seems to work every time. I also use it from a Linksys SPA3102 Voip gw, but there it's only used for outbound and not configured to register (just to make a call). It is 100% reliable.

So this could be a subtle timing error.

* Anyone else seen this?
* Recommendations as to how to debug (I am linux/partially SIP literate, just less familiar with the N900)

I experience the same problem with voip, losing the connection with the sip provider.

I tried to create a DBUS script and trigger condition in /etc/dbus-scripts.d which automatically checks and restart that in order let the n900 be reinitialized.

A command for analyzing the tcp traffic is explained here after.
http://www.jonathanmanning.com/2009/...dump-on-linux/

I used:
The script is quite easy, but I could not find a solution for finding a proper triggering measurement for capturing the loss of the sip connection at the device.

Hopefully someone finds a good solution.