Dayton, Robert L. <br/><br/>
Guide to Integrating Digital Services  T1, DDS and voice Integrated Network Architecture 

 - New York  McGraw-Hill  1989 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Telephone Transmission
<br/><br/><label>Dewey Class. No.: </label>621.3878  / D27G