Isdn explained :  Worldwide network and applications technology / 
John n. griffiths ... [y otros.] 
 - 2 
 - 239 páginas 
<br/><br/><label>ISBN: </label>0-471-93480-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Redes digitales de servicios integrados
<br/><br/><label>LC Class. No.: </label>TK5103  / I73 1992