Held, Gil <br/><br/>
Voice & data internetworking / 
Gil Held 
 - 3rd ed. 
 - New York :  Osborne/McGraw-Hill,  2001 
 - xviii, 397 p. :  ill. ;  24 cm 
<br/><br/><label>ISBN: </label>0072131837 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TCP/IP (Computer network protocol)<br/>Digital telephone systems<br/>Computer networks<br/>Data transmission systems