TY  - BOOK
AU  - Ahson, Syed
AU  - Ilyas, Mohammd
TI  - VoIP handbook
SN  - 9781032634562
U1  - 004.695 AHS 
PY  - 2009///
CY  - New York
PB  - CRC Press.
KW  - Electrical engineering
KW  - Internet telephony
KW  - Telephone systems
ER  -