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"Practical VoIP using Vocal - MGCP, H.323, SIP, RTP, COPS, RADIUS, and more."
Luan Dang, Cullen Jennings, David Kelly (2002)
- Luan Dang, Cullen Jennings, David Kelly:
Practical VoIP using Vocal - MGCP, H.323, SIP, RTP, COPS, RADIUS, and more. O'Reilly 2002, ISBN 978-0-596-00078-3, pp. I-XVII, 1-502
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