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Phase 4 · 4.3

Telephony Infrastructure Setup

Letting a Voice AI Agent talk to the telephone world involves more layers than it appears. The core components are these:

  1. IVR integrationWill the AI Agent take over from the start of the existing switchboard and IVR infrastructure, or only after a particular menu selection? This has to be settled.
  2. SIP trunk and MRCPCarrying the audio stream and bridging it to the speech recognition and synthesis engines happens in this layer.
  3. BYOCBring your own carrier. This is where you decide whether the organisation keeps its existing telecoms contract.
  4. Number and recording managementNumber portability, call recording and compliant retention periods are planned here.

Two technical factors shape the user experience of a voice interaction more than anything else. The first is the latency budget: the time between the customer finishing a sentence and the AI Agent starting to answer. The longer that gets, the faster the call stops feeling natural. The budget is not a single number. It is the sum of several steps in sequence: speech turning into text, the model producing its first response, and text turning back into speech. Even when each step is fast on its own, the total adds up quickly, which makes latency a design decision aimed at the whole chain rather than at one component. The second is barge-in support: when the customer speaks while the AI Agent is talking, the audio has to stop immediately and the customer has to be heard. Without it the call never feels like a human exchange.

A common mistake: testing these two factors only under ideal conditions. A demo on office wifi with a clean microphone can work beautifully. But most real traffic will come from a mobile phone with weak reception, a noisy environment or a speakerphone. How speech recognition behaves against background noise, and how latency is affected on a poor line, have to be tested separately under difficult conditions before production. A system tested only in good conditions can deliver a far worse experience than average once it is live.

This step adds a layer most international sources skip: compatibility with local operators. CBOT's telephony infrastructure supports deployments that work with all operators. That turns something many global platforms try to solve afterwards into something solved from the start.