TY  - BOOK
AU  - Ahson, Syed A.
AU  - Ilyas, Mohammad
TI  - VoIP Handbook: applications, technologies, reliability, and security
SN  - 1420070207
U1  - 005.8 AHS 
PY  - 2009///
CY  - New York
PB  - CRC Press
KW  - Network Security
ER  -