ISDN explained :  worldwide network and applications technology / 
John M. Griffiths with Peter Adams ... (et al.) 
 - 3rd ed. 
 - Chichester :  John  Wiley & Sons,  1998. 
 - 291 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0471979058  RM238.99 
<br/><br/><label>LCCN: </label>97-051383 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Integrated services digital networks.