TY  - BOOK
AU  - Flanagan,William A.
TI  - VoIP and unified communications: internet telephony and the future voice network 
SN  - 9781118019214
PY  - 2012///
CY  - Hoboken, N. J.
PB  - Wiley
KW  - nternet telephony
N1  - Includes index
ER  -