Voice over IP :  systems and solutions / 
edited by Richard Swale. 
 - London :  Institution of Electrical Engineers,  c2001. 
 - xviii, 484 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0852960247  TZS 35,000/= 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Internet telephony.
<br/><br/><label>Dewey Class. No.: </label>621.385 VOI