TY  - BOOK
AU  - Endler,David
AU  - Collier,Mark
TI  - Hacking exposed VoIP: voice over IP security secrets & solutions 
SN  - 0072263644
PY  - 2007///
CY  - New York
PB  - McGraw-Hill
KW  - Internet telephony
KW  - Security measures
KW  - Computer networks
ER  -