TY  - BOOK
AU  - Horak, Ray
TI  - communication systems and networks
SN  - 812650157X
CY  - Mumbai
KW  - Communication networks
KW  - Computer networks
KW  - Data communications
KW  - Public switched telephone network -- PSTN
KW  - Voice communications systems
KW  - Wireless networking
N1  - Includes index
ER  -