TY  - BOOK
AU  - Wallace, Kevin
TI  - Authorized self-study guide Cisco voice over IP, 3/e (642-436)
SN  - 9788131724446
U1  - 004.62 WAL 
PY  - 2008///
CY  - New Delhi
PB  - Pearson
KW  - Protocol - networking- Voice over IP
ER  -