TY  - BOOK
AU  - Held, Gilbert
TI  - Understanding data communications
SN  - 672309343
AV  - TK 5105 .H45 1996  
PY  - 1996///
CY  - Indianapolis, Indiana
PB  - Sams Publishing
KW  - DATA TRANSMISSION SYSTEMS
N1  - Includes index
N2  - This thorough look at data communications explains to the reader the inner workings of data terminals, transmission channels, fibre optics, satellites and modems and the various implementations of these hardware systems on the Internet
ER  -