Ronayne, John P. <br/><br/>
Introduction to digital communications switching / 
by John P. Ronayne. 
 - 2nd ed. 
 - Indianapolis, Ind. :  Howard W. Sams & Co.,   1992. 
 - 238 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8185614660 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital communications.<br/>Digital telephone systems.