TY  - BOOK
AU  - Ahson, Syed A. 
AU  - Ilyas, Mohammad 
TI  - Voip handbook applications, technologies reliability, and security 
SN  - 9781420070200
U1  - 005.4476 
PY  - 2009///
PB  - CRC Press Boca Raton London ; 
KW  - Computer Science
ER  -