Robert L Dayton <br/><br/>
Guide To  Integrating Digital Services/:T1,DDS And Voice Integrated Network Architecture 

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 -  Intertext Publications  1989 
 - 290 
<br/><br/>  
<br/><br/><label>ISBN: </label>0-07-016188-7 
<br/><br/><label>Dewey Class. No.: </label>004.738.5