VICIdial Asterisk Configuration: SIP, Codecs & NAT

You finished the VICIdial install , agents can log in, and you've got a SIP trunk registered. Then the real problems start. One-way audio on half your calls. Registration drops every 90 seconds. Your carrier complains about codec mismatches. Remote agents hear nothing. And every forum thread you find says "check your NAT settings" without telling you what that actually means. This is the Asterisk configuration guide that VICIdial operators actually need. VICIdial is, at its core, a sophisticated wrapper around Asterisk — the open-source PBX that handles every call, every transfer, every recording, every piece of audio that flows through your contact center. The VICIdial admin GUI manages campaigns, agents, and lists. But underneath all of that, Asterisk is doing the actual telephony work. And Asterisk's configuration determines whether your calls sound crystal clear or like they're being routed through a tin can on a string. We've configured Asterisk on hundreds of VICIdial deployments