TY  - GEN
AU  - Hersent, Olivier
TI  -  Ip Telephony: Packet-Based Multimedia Communications Systems
SN  -  8178082586
U1  -  004.6 
PY  - 2002///
CY  - Singapore
PB  - Pearson Education Pte. Ltd
N1  - Includes bibliographical references and index
ER  -