Call Setup

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Added: November 13, 2008 This Presentation is Public 
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Slide1: 3CX VoIP Nugget Call Setup with Nick Galea, CEO


Call Setup for internal calls (LAN): Call Setup for internal calls (LAN) Call setup for a call to another extension or via a VOIP gateway In this case, phones are connected directly, 3CX only performs call setup! 2 Ports per Endpoint, one for RTP and one for RTCP! From: 10.0.0.106:42016(42017) To: 10.0.0.121:57158(57159) To: 10.0.0.106:42016(42017) From: 10.0.0.121:57158(57159) Audio Signalling Signalling Ext. 101 Ext. 100 PBX Server


Call setup for calls via provider (WAN): Call setup for calls via provider (WAN) Call setup for a call via a VOIP provider or an external extension 3CX Phone System “sits in the middle” for better firewall traversal Port range for RTP 9000- and up (configurable) STUN request needed to get external IP 82.102.77.26:13882 10.172.0.5:7036 82.102.83.161:9012 10.172.0.110:64050 Audio Signalling Signalling Ext. 144 Ext. 107 PBX Server Media Server Audio


Slide4: More VoIP Nuggets and VoIP info at: http://www.3cx.com/blog