Talley, David. <br/><br/>
Basic carrier telephony / 
David Talley. 
 - revised Second edition. 
 - 198 pages :  illustration ;   23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0810457490 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Carrier Telephony.<br/>Communications.