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1.
Guide to Voice and Video over IP : For Fixed and Mobile Networks by Sun, Lingfen, Mkwawa, Is-Ha... ISBN: 9781447149040 List Price: $79.95
2.
Guide to Voice and Video over IP: For Fixed and Mobile Networks (Computer Communications and... by Lingfen Sun, Is-Haka Mkwawa... ISBN: 9781447158431 List Price: $79.95