TY  - BOOK
AU  - HAWTON,H.S
TI  - INTEGRATED DIGITAL NETWORKS / 
U1  - 621.3851 
PY  - 1993///
CY  - [S.N] : 
PB  - SIGMA PRESS ، 
KW  - DIGITAL TRANSMISSION
KW  - TELEPHONE
KW  - DIGITAL (NETWORK)
KW  - NET WORK
ER  -