Hi feerseer'ers,
Camilo, Aaron and I had lots of discussion around SIP in general, mostly
in the purpose of integrating conference call support to freeseer.
I happened to have received a excellent book on the subject as a gift
while working on Hackus competition (
www.nsec.io), that covers the ABC
of the SIP world for newbies.
> Hacking VoIP: Protocols, Attacks, and Countermeasures by Himanshu Dwivedi
Have a great reading!
Olivier