TY  - BOOK
AU  - Hersent, Olivier.
TI  - IP Telephony: Packet-based multimedia communications systems 
SN  - 9788178082585 (pbk.)
U1  - 004.6 
PY  - 2003///
CY  - Delhi
PB  - Pearson, 
KW  - IP Telephony
N1  - Including Index
ER  -