@book{33553,
	author = {Muhammad Harris Khan, Syed Waqar Ahmed, Fahad Afzal & Hera Gohar Saeed},
	title = {Analyze The Qos Aspects of Voice Traffic Over an IP Network & to Deploy Site to Site VPN},
	publisher = {UITU,},
	year = {2005},
	address = {Karachi:}
}