TY  - BOOK
AU  - Bellamy John , C.
TI  - Digital Telephony
SN  - 0-471-34571-7
U1  - 621.385 
PY  - 2000///
CY  - New York
PB  - John Wiley & Sons
KW  - Engineering
KW  - Background and Terminology , Why Digital ?  Voice Digitization
ER  -