TY  - BOOK
AU  - Ahson, Syed A.,
AU  - Ilyas, Mohammad.
TI  - VoIP Handbook: Applications, Technologies, Reliability, and Security
SN  - 9781420070200
U1  - 004.695 
PY  - 2009///
CY  - Boca Raton
PB  - CRC Press
ER  -