TY  - BOOK
AU  - Carpenter,Tom
TI  - CCNA cisco certified network associate voice study guide (exams 640+460 and 642-436) / 
SN  - 9780071074421
U1  - 004.62 
PY  - 2011///
CY  - NULL : 
PB  - Tata McGraw Hill Education , 
KW  - INTERNET TELEPHONY-EXAMINATIONS-STUDY GUIDES
N1  - Includes index and glossary
ER  -