VoIP SANS doc

SANS published last week a "MUST READ" document about common VoIP
vulnerabilities.
As usual, I know 90% of what is written.
But, I didn't know how easy is to find information about VoIP system
installed in corporate networks.
Thank you google ! I really was impressed by "inurl:" power in requests !

SANS VoIP vulnerability on VOIPSA list:
http://voipsa.org/pipermail/voipsec_voipsa.org/2008-January/002554.html