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On AI Talks #9, host Aemal Sayer sits down with Cristian Livadaru, an n8n Ambassador in Vienna, to build a working voice AI phone line, live, using n8n + ElevenLabs (plus a dash of LLM tooling). We chat early-days retro PCs (8086 nostalgia), why open-source + self-hosting wins, real-world automations (accounting, security alerts, IP threat checks), and voice agents that read contracts by phone, including common security pitfalls like OTP leaks and prompt injection. What we build live: a phone number you can call that answers questions about a Google Doc contract (tech stack, deadlines, pricing) via n8n + an LLM + ElevenLabs TTS/ASR. Fast, simple, and surprisingly production-ready. Chapters (add timestamps after upload) Highlights: — Cristian’s background (n8n since 2019/20) — 8086/Pentium memories & curiosity-driven tinkering — From Zapier/Make to self-hosted n8n — Accounting automation → regex vs LLM extraction — Security mini-workflow: phishing/IP alerts in minutes — Voice AI for contracts (RAG vs pragmatic doc lookup) — SIP trunking to ElevenLabs, phone routing, latency — Security pitfalls: OTP in prompts, auth outside the LLM — Live build: n8n webhook + Google Doc → LLM → ElevenLabs phone line — Debugging in n8n (pin data, copy to editor, executions FTW) — Open source vs “agent kits,” vendor risk, EU AI Act low-risk use cases — Wrap-up & next steps Tools & Topics Mentioned — n8n (open-source workflow automation) — ElevenLabs (ASR/TTS, SIP) — LLMs & agents (tool calling, JSON schema, memory) — Google Docs as knowledge source Security: auth before AI, separation of concerns, prompt-injection guardrails Try the build yourself Connect Host: Aemal Sayer — https://linkedin.com/in/aemal Guest: Cristian Livadaru — https://www.linkedin.com/in/livadaru/ If you enjoyed this, subscribe and drop your dream automation below, maybe we’ll build it on the show. 🎙️⚙️ #AITalks #n8n #VoiceAI #ElevenLabs #Automation #OpenSource #AIagents #Security #SIP #GoogleDocs