Bates, Regis J. <br/><br/>
Voive and data communications handbook 

 - 4th 
 - New delhi  Tata Mc Graw-Hill publishing company limited  2001 
 - xxviii  ill. 
<br/><br/><label>ISBN: </label>0070472815 
<br/><br/><label>Subjects--Topical Terms: </label><br/>telecommunication handbooks, manuals
<br/><br/><label>LC Class. No.: </label>TK50105  / .B38