VoIP Hacks: Tips & Tools for Internet Telephony: Wallingford, Theodore: 9780596101336: Amazon.com: Books
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VoIP: Internet Linking for Radio Amateurs: Jonathan Taylor: 9780872591431: Amazon.com: Books
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VoIP For Dummies: Kelly, Timothy V.: 9780764588433: Amazon.com: Books
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VoIP Deployment For Dummies: Olejniczak, Stephen P.: 9780470385432: Amazon.com: Books
VoIP Deployment For Dummies: Olejniczak, Stephen P.: 9780470385432: Amazon.com: Books
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