TY  - BOOK
AU  - bates,regis j.
AU  - gregory,donald w.
TI  - Voice And Data Communications Handbook / 
U1  - 004.6/ BAT 
PY  - 2000///
CY  - new delhi
PB  - tata mcgraw-hill
KW  - COMMUNICATION
KW  - COMMUNICATION NETWORKS
ER  -