TY  - GEN
AU  - Hersent,Oliver
AU  - Gurle,David
TI  - IP telephony: Packet-based multimedia communications systems
SN  - 81-7808-258-6
U1  - 681.324 
PY  - 2003///
CY  - Singapore
PB  - Pearson Education
KW  - 681.324
KW  - Telecommunication
ER  -