Cisco voice over frame relay, ATM, and IP :  IP telephony self-study / 
[editors]: Steve McQuerry, Kelly McGrew, Stephen Foy. 
 - Indianapolis, IN :  Cisco Press,  2004. 
 - XXVII, 517 s. :  il. ;  24 cm. 
<br/><br/>Bibliogr. s. 491-493. Indeks. 
<br/><br/><label>ISBN: </label>1578702275