Carrier-grade VoIP von Swale, Richard, Collins, Daniel

Available for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access
Also available remotely for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access thru EZproxy

Voice over IP systems and solutions

Available for University of the Philippines Diliman via IET Digital Library. Click here to access
Also available remotely for University of the Philippines Diliman via IET Digital Library. Click here to access thru EZproxy