TY  - BOOK
AU  - Collins, Daniel 
TI  - Carrier grade voice over IP
SN  - 9780070603233
U1  - 006.454 C692c2 
PY  - 2003///
CY  - New Delhi
PB  - Tata McGraw-Hill Publishing Company Limited
KW  - Internet telephony
KW  - Digital telephone systems
ER  -