TY  - BOOK
AU  - Bellamy, John C.,
TI  - Digital Telephony
SN  - 0471345717
U1  - 621.385 
PY  - 2000///
CY  - New York
PB  - Wiley- Interscience Publication
N1  - This book is having appendixes from 573 - 607
ER  -