VoIP 101 (Telecom for Non-Engineers): Coll, Eric: 9781894887915: Amazon.com: Books
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How to Start a VoIP Business: A Six-Stage Guide to Becoming a VoIP Service Provider: Stanislovaitis, Vilius: 9786094088308: Amazon.com: Books
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VoIP Hacks: Tips & Tools for Internet Telephony: Wallingford, Theodore: 9780596101336: Amazon.com: Books
Packet Guide to Voice over IP: A system administrator's guide to VoIP technologies: 9781449339678: Computer Science Books @ Amazon.com
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