TY  - BOOK
AU  - Bellamy,John C., x
AU  - x
TI  - Digital telephony: x
SN  - 9814126357
U1  - 621.385/B425d 
PY  - 2000///
CY  - New Delhi
PB  - Wily
KW  - Digital telephone systems
KW  - Engineering
N1  - Includes
ER  -