Executive summary
4-week roadmap to replace a classic IVR with an AI voice agent: shadow routing, integrations, GDPR/AI Act and typical 60-day results.
Migrating from a classic IVR to an AI voice agent takes 2-4 weeks without losing a single call. Same number, same integrations, same telco. Only the answering layer changes: from routing to resolving. IACall has done it across law firms, property managers, mid-sized banking and insurance.
Why IVRs are exhausted in 2026
Customers recognise the wall and hang up. Typical IVR baseline: 30-45% abandonment on menus over 4 options, 15-20% misrouted transfers, zero qualification, zero traceability.
The 4-week roadmap (the one IACall uses)
- Week 1 — audit the existing IVR and map flows.
- Week 2 — configure the agent, connect the CRM.
- Week 3 — shadow routing on 10-30% of real traffic.
- Week 4 — full cutover with IVR kept as 30-60 day fallback.
What stays the same
- Phone number (no porting).
- Telco provider.
- CRM and all integrations.
- Legal recordings you must keep.
Typical 60-day outcome
- Abandonment from 30-45% to 5-10%.
- 60-80% of repetitive calls resolved without a human.
- Average handling time —30% to —50% on what does escalate.
- 100% of calls recorded and transcribed.
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Written by
José María Lozano is CEO and co-founder of IACall, a Spanish company building AI voice agents that answer phone calls in real time. He works mainly with law firms, accountancy practices, property managers, estate agents, clinics and workshops: businesses where a missed call is a missed opportunity. IACall operates in Spanish, Catalan and Galician, with data hosted in the EU and compliance with GDPR and the EU AI Act.