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3CX Technical Presentations
Server Activity Log

This VoIP nugget explains how to interpret the 3CX Phone System server status logs. The nugget walks you through the setup and tear down of a phone call, explaining the messages that are generated along the way.

This nugget is an excellent way to learn how to use the server status logs to troubleshoot problems

Firewalls and VoIP
This video gives on overview of what Firewalls and VoIP are, how the two related and what the issues are with their configuration.
RTP and SIP Overview
This VoIP nugget gives a high level introduction about SIP and RTP. It highlights the useful basics and principles
SIP Call Setup
A high level overview of SIP Call setup and the ports involved
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