# FlixZone

> Free production-grade tutorials for ViciDial, Asterisk, and VoIP call-center
> infrastructure: troubleshooting runbooks, admin how-tos, AI voice agents,
> monitoring, and security. Every guide is written from real production call
> centers, with working commands, SQL against actual ViciDial tables, and
> config file examples.

Site: https://flixzone.icu
All tutorials index: https://flixzone.icu/tutorials/
About: https://flixzone.icu/about/
Contact: https://flixzone.icu/contact/

## ViciDial troubleshooting (errors and fixes)

- [ViciDial Troubleshooting Mega Guide](https://flixzone.icu/tutorials/vicidial-troubleshooting-mega-guide/): one-stop diagnostic reference for the most common ViciDial failures
- [Troubleshooting One-Way Audio in ViciDial / Asterisk](https://flixzone.icu/tutorials/troubleshooting-one-way-audio-in-vicidial-asterisk/): codec mismatches, RTP/NAT problems, carrier issues
- [ViciDial DEAD Call Status — Why Agents Get Dead Air](https://flixzone.icu/tutorials/vicidial-dead-call-status-why-agents-get-dead-air-how-to-fix-it/): root causes and fixes for dead calls
- [ViciDial "Login Incorrect" Error Fix](https://flixzone.icu/tutorials/vicidial-login-incorrect-error-fix-agent-admin-auth-failures/): agent and admin authentication failures
- ["No One Is in Your Session" Error — Causes & Fixes](https://flixzone.icu/tutorials/vicidial-no-one-is-in-your-session-error-causes-fixes/)
- [Agent Screen Blank or Not Loading](https://flixzone.icu/tutorials/vicidial-agent-screen-blank-or-not-loading-php-browser-fixes/): PHP and browser-side fixes
- [Hopper Not Loading Leads](https://flixzone.icu/tutorials/vicidial-hopper-not-loading-leads-troubleshooting-the-lead-hopper/)
- [Campaign Has No Dialable Leads](https://flixzone.icu/tutorials/vicidial-campaign-has-no-dialable-leads-list-hopper-troubleshooting/)
- [VDAD Not Dialing — AST_VDadapt Process Troubleshooting](https://flixzone.icu/tutorials/vicidial-vdad-not-dialing-astvdadapt-process-troubleshooting/)
- [Recordings Missing — Why Calls Are Not Being Recorded](https://flixzone.icu/tutorials/vicidial-recordings-missing-why-calls-are-not-being-recorded/)
- [Dropped Calls (DROP status) — Causes & Compliance Fixes](https://flixzone.icu/tutorials/vicidial-dropped-calls-drop-status-causes-compliance-fixes/)
- [MySQL Connection Error — Database Connectivity Fixes](https://flixzone.icu/tutorials/vicidial-mysql-connection-error-database-connectivity-fixes/)

## Asterisk and SIP errors

- [SIP 403 Forbidden — Trunk Authentication Troubleshooting](https://flixzone.icu/tutorials/sip-403-forbidden-error-trunk-authentication-troubleshooting/)
- [SIP 503 Service Unavailable — Carrier & Server-Side Fixes](https://flixzone.icu/tutorials/sip-503-service-unavailable-carrier-server-side-fixes/)
- [SIP 408 Request Timeout — Network & Firewall Troubleshooting](https://flixzone.icu/tutorials/sip-408-request-timeout-network-firewall-troubleshooting/)
- [Asterisk "All Circuits Busy" — SIP Channel Exhaustion Fix](https://flixzone.icu/tutorials/asterisk-all-circuits-busy-error-sip-channel-exhaustion-fix/)
- [Asterisk "Peer Is Not Registered" — SIP Registration Debug](https://flixzone.icu/tutorials/asterisk-peer-is-not-registered-sip-registration-failure-debug/)
- [Asterisk Core Dump / Crash Analysis — Debugging Segfaults](https://flixzone.icu/tutorials/asterisk-core-dump-crash-analysis-debugging-segfaults/)
- [Asterisk Codec Negotiation: G.711 vs G.729 vs Opus](https://flixzone.icu/tutorials/asterisk-codec-negotiation-g711-vs-g729-vs-opus/)
- [Asterisk + Fail2ban: Blocking SIP Brute-Force Attacks](https://flixzone.icu/tutorials/asterisk-fail2ban-blocking-sip-brute-force-attacks/)

## ViciDial administration how-tos

- [How to Add an Agent in ViciDial](https://flixzone.icu/tutorials/how-to-add-an-agent-in-vicidial-user-setup-phone-config/): user setup and phone config
- [How to Change Campaign Dial Speed](https://flixzone.icu/tutorials/how-to-change-campaign-dial-speed-in-vicidial/): web admin, direct DB, and API methods
- [How to Upload a Lead List (CSV Format & Mapping)](https://flixzone.icu/tutorials/how-to-upload-a-lead-list-to-vicidial-csv-format-mapping/)
- [How to Set Up Auto-Dial: Predictive, Ratio, Progressive](https://flixzone.icu/tutorials/how-to-set-up-vicidial-auto-dial-predictive-ratio-progressive/)
- [How to Set Up DID Routing / Inbound Numbers](https://flixzone.icu/tutorials/how-to-set-up-vicidial-did-routing-inbound-number-configuration/)
- [How to Configure Answering Machine Detection (AMD)](https://flixzone.icu/tutorials/how-to-configure-vicidial-answering-machine-detection-amd/)
- [How to Create Custom ViciDial Reports with SQL](https://flixzone.icu/tutorials/how-to-create-custom-vicidial-reports-with-sql-queries/)
- [ViciDial Disposition Statuses — Complete Reference](https://flixzone.icu/tutorials/vicidial-disposition-statuses-complete-reference-custom-setup/)
- [Scheduled Callbacks (Agent & Campaign Level)](https://flixzone.icu/tutorials/how-to-set-up-vicidial-scheduled-callbacks-agent-campaign-level/)
- [Caller ID (CID) Settings per Campaign](https://flixzone.icu/tutorials/how-to-configure-vicidial-caller-id-cid-settings-per-campaign/)
- [Lead Recycling & List Management Best Practices](https://flixzone.icu/tutorials/vicidial-lead-recycling-list-management-best-practices/)
- [Campaign & DNC (Do Not Call) List Management](https://flixzone.icu/tutorials/vicidial-campaign-dnc-do-not-call-list-management/)

## Setup, scaling and security

- [ViciDial Cluster Setup Guide](https://flixzone.icu/tutorials/vicidial-cluster-setup-guide/): multi-server ViciDial architecture
- [WebRTC / ViciPhone Complete Setup](https://flixzone.icu/tutorials/webrtc-viciphone-complete-setup/)
- [ViciDial Remote Agents: WebRTC, VPN & Firewall Setup](https://flixzone.icu/tutorials/vicidial-remote-agents-webrtc-vpn-firewall-setup/)
- [ViciDial Security Hardening — Complete Guide](https://flixzone.icu/tutorials/vicidial-security-hardening-complete-guide/)
- [Securing the ViciDial Admin Interface (HTTPS, IP Whitelist, 2FA)](https://flixzone.icu/tutorials/securing-vicidial-admin-interface-https-ip-whitelist-2fa/)
- [ViciDial Database Performance Optimization](https://flixzone.icu/tutorials/vicidial-database-performance-optimization/)
- [ViciDial Safe Upgrade Playbook](https://flixzone.icu/tutorials/vicidial-safe-upgrade-playbook/)
- [Automated ViciDial Backups (Database, Recordings, Config)](https://flixzone.icu/tutorials/automated-vicidial-backups-database-recordings-config/)
- [SIP Trunk Failover & Load Balancing for ViciDial](https://flixzone.icu/tutorials/sip-trunk-failover-load-balancing-for-vicidial/)
- [Recording Storage: NFS, S3 & Archival Strategies](https://flixzone.icu/tutorials/vicidial-recording-storage-nfs-s3-archival-strategies/)

## AI voice and call intelligence

- [AI Voice Agent on Asterisk](https://flixzone.icu/tutorials/ai-voice-agent-asterisk/): build a phone-answering AI agent
- [AI Voice Agent with OpenAI Realtime API + Asterisk](https://flixzone.icu/tutorials/ai-voice-agent-openai-realtime-asterisk/)
- [ElevenLabs Cloud Voice Agent over SIP](https://flixzone.icu/tutorials/elevenlabs-cloud-voice-agent-sip/)
- [Call Transcription with faster-whisper](https://flixzone.icu/tutorials/call-transcription-faster-whisper/)
- [QA Pipeline: Call Transcription + AI Scoring](https://flixzone.icu/tutorials/qa-pipeline-call-transcription-ai-scoring/)
- [AI-Powered AMD with Whisper + ML Classifier](https://flixzone.icu/tutorials/ai-powered-amd-whisper-ml-classifier/)
- [Voice Agent Prompt Engineering & Conversation Design](https://flixzone.icu/tutorials/voice-agent-prompt-engineering-conversation-design/)

## Monitoring and infrastructure

- [VoIP Monitoring Stack](https://flixzone.icu/tutorials/voip-monitoring-stack/): end-to-end call-quality monitoring with Grafana, Prometheus, Loki, Homer
- [Custom Asterisk Prometheus Exporter](https://flixzone.icu/tutorials/custom-asterisk-prometheus-exporter/)
- [Monitoring Asterisk with SNMP (Nagios/Zabbix)](https://flixzone.icu/tutorials/monitoring-asterisk-with-snmp-nagioszabbix/)
- [VoIP Troubleshooting Runbook](https://flixzone.icu/tutorials/voip-troubleshooting-runbook/)
- [MariaDB Multi-Source Replication](https://flixzone.icu/tutorials/mariadb-multi-source-replication/)
- [Kamailio + FreeSWITCH Load Balancing & HA](https://flixzone.icu/tutorials/kamailio-freeswitch-load-balancing-ha/)
- [FreeSWITCH Fundamentals](https://flixzone.icu/tutorials/freeswitch-fundamentals/)
- [Kamailio Fundamentals](https://flixzone.icu/tutorials/kamailio-fundamentals/)

## Optional

- [Guide hub: ViciDial](https://flixzone.icu/guides/vicidial/)
- [Guide hub: Monitoring](https://flixzone.icu/guides/monitoring/)
- [Guide hub: AI Voice](https://flixzone.icu/guides/ai-voice/)
- [Guide hub: Infrastructure](https://flixzone.icu/guides/infrastructure/)
- [Guide hub: AI Ops](https://flixzone.icu/guides/ai-ops/)