@book{56594,
	author = {Goralski, Walter. and Kolon, Matthew C. and ebrary, Inc.},
	title = {IP telephony},
	publisher = {McGraw-Hill,},
	year = {c2000.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=5004501}
}