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Stitex
AI adoption

AI Voice Agent for Inbound Calls: How It Works

Short answer: a voice agent answers in natural speech within a couple of seconds, at any hour — works out what the caller needs, answers the routine questions, writes the enquiry into your CRM and transfers the hot ones to a manager. This is not a “press one for sales” menu. Here is how it is built.

July 21, 20268 min readStitex Technologies

What missed calls actually cost

Every unanswered call is a customer already dialling a competitor. Up to a third of enquiries arrive outside business hours, and at peak times two operators cannot stretch across ten simultaneous calls — a queue with hold music keeps someone for about forty seconds before they hang up.

How a voice AI is put together

It is not a rigid script but a chain of technologies working in real time:

ComponentWhat it does
Speech recognition (ASR)turns the caller’s voice into text on the fly
Language modelunderstands the intent, answers from your knowledge base, holds the dialogue
Speech synthesis (TTS)voices the answer naturally
Integrationscreates the deal in your CRM, saves the transcript, transfers to a manager
Real speech, not an IVR
It talks in free-form speech, handles interruptions and clarifications, and replies in about two seconds — faster than an operator picks up the handset.

What it does on the line

  • Takes any number of inbound calls at once — the line is never busy,
  • Qualifies the enquiry with your questions and answers the routine ones: price, lead time, availability, address,
  • Creates a deal in the CRM with the recording and a text transcript,
  • Transfers hot customers to a manager immediately or books a call-back slot,
  • Runs outbound campaigns to a script: appointment confirmations, reminders, surveys.

Data and privacy

Call recordings are personal data, so recognition and analysis run on servers in the appropriate jurisdiction, recordings are kept for a limited retention period and de-identified by policy. The whole contour can be installed on your own server. This setup runs in production on our own telephony. More on the AI operator page, and on running models in-house in on-premise LLM vs cloud AI.

Frequently asked questions

Will customers realise they are talking to a robot?

The voice is natural and the speech is free-form, but we do not pass the AI off as a human: if asked, it says plainly that it is a voice assistant and offers to transfer to a person. What annoys people is not the robot — it is not getting their problem solved, and this one solves it.

What if someone asks something outside the script?

It answers from your knowledge base rather than a rigid script. If the question is genuinely outside its competence, it records it and hands the caller to a manager. Those cases get reviewed and folded back into the training.

Is it hard to connect to our phone system and CRM?

We connect to any SIP telephony, including your existing number. On the CRM side there are ready integrations for the common platforms and an API for the rest. It usually takes a few days.

Hear how it speaks

Leave a request and the AI operator will call you back, so you can judge the speech quality on a real conversation.