TY  - BOOK
AU  - Forouzan, Behrouz A.
TI  - Data communications and networking
SN  - 0070584087
U1  - 004.65  3
PY  - 2006///
CY  - New Delhi
PB  - Tata McGraw Hill Publishing Company Ltd
KW  - Physical layer
KW  - Digital transmission
KW  - Circuit switching and telephone network
ER  -