Held, Gilbert. <br/><br/>
Data communications testing and troubleshooting / 
Gilbert Held. 
 - 2nd ed. 
 - New York :  Van Nostrand Reinhold,  c1992. 
 - xiii, 264 p. :  ill. ;  24 cm. 
 - VNR computer library. .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0442009909 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems--Testing.<br/>Data transmission systems--Maintenance and repair.<br/>Computer networks.<br/>Computer capacity--Planning.