TY  - GEN
AU  - Davidson, Jonathan
AU  - Mukherjee, Sudipto
AU  - Peters, James
AU  - Bhatia, Manoj
AU  - Kalidindi, Satish
TI  - Voice over IP fundamentals
SN  - 9788131722893
U1  - 004.6 
PY  - 2008///
CY  - New Delhi
PB  - Pearson education
KW  - Gateway central protocols
KW  - PSTN service
KW  - Voice security
KW  - Signaling system
ER  -