Tracing packets - asterisk issues

[Da Rock]

I have been trying to get some pointers on my asterisk issues and I've 
only been hearing crickets chirping (Asterisk list and here). I need a 
pointer or two so I can fix this issue, so I'll try another angle.

How do I trace IP packets across the network (pf firewall included)? And 
would it be possible to read it visually (human readable)?

Cheers