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Internet Communications Using SIP: Henry Sinnreich, Alan B. Johnston: 9780471413998: Amazon.com: Books
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Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony: Hersent, Olivier, Petit, Jean-Pierre, Gurle, David: 9780470023624: Amazon.com: Books
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Introduction to IP Telephony: Why and How Companies are Upgrading Private Telephone Systems to use VoIP Services, Second Edition: Lawrence Harte: 9781932813791: Amazon.com: Books
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Telecom 101: Sixth Edition 2022. High-Quality Reference Book Covering All Major Telecommunications Topics... in Plain English. (Telecom for Non-Engineers): Coll, Eric: 9781894887113: Amazon.com: Books
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