Part 2 explains various types of VoIP systems and different security formats. In Part 2, there are detailed animations on: Proxy/Gateway/SBC-Session Border Controllers In/Outside the Firewall Proxy/Gateway in Co-Edge Mode Proxy/Gateway Outside the Firewall

Before and after installation a VoIP system various tests should be completed. In addition, there are certainly other tests such as functional protocol testing called fuzzing that should also be completed.

There is critical need to understand all the new terms related to VoIP as well as international standards, CODECs, SIP-RTP emerging technologies and new VOIP services.

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