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Architecture 14 min 2026-02-15

Engineering Specification for Enterprise Voice AI Agents

Detailed technical checklist for deploying telephone agents: SIP trunking, deterministic state machines, and fallback guarantees.

Deterministic State Machines vs Unconstrained LLMs

Allowing an open-ended LLM to freely chat on an enterprise hotline is fatal for business operations. Vext wraps language models inside strict deterministic state machines. The agent can only execute validated business actions: check invoice, book slot, send SMS, or transfer to human operator.

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