Handling after-hours calls with AI: architecture lessons

30–40% of business calls arrive after hours. We built an AI system to handle them and learned some things:

• Latency matters more at night — callers are often stressed/urgent
• Context switching — the AI needs to know it's after-hours and adjust (no "let me transfer you")
• Emergency routing — some calls genuinely need a human at 3AM
• Timezone handling — harder than it sounds when serving Ireland + Argentina

The voicemail-to-AI upgrade was the biggest win. 80% voicemail abandonment → 90%+ AI completion rate.

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