Telecommunication technology / 
3G E- Learning LLC 
 - New York :  3G E-learning LLC,  2019. 
 - xii, 246 p.: col. Ill.; 23.5 cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9781984625717 
<br/><br/><label>Dewey Class. No.: </label>C 621.382 T267 2019