How do I route only overflow calls to an AI receptionist?

The three overflow rules most contractors use

• No answer: if nobody picks up within your chosen ring time, forward to the AI number.
• Busy: if every line is in use, forward right away instead of sending the caller to voicemail.
• After hours: on a schedule, send all calls straight to the AI outside office hours.

How to set it up

• Get the forwarding number from your AI receptionist tool. Most give you a dedicated number to forward to.
• Find conditional forwarding in your phone system. On a mobile or landline carrier it's usually called conditional or no-answer forwarding; on a VoIP system it's usually a ring group, call flow, or business-hours rule. Your carrier's help pages list the exact steps.
• Pick a ring time. Long enough for the office to grab the call, short enough that the caller doesn't give up. Test a few settings and listen to how it feels from the caller's side.
• Add a business-hours schedule so after-hours calls skip the ring and go straight to the AI.
• Make test calls for each rule (unanswered, busy, after hours) before telling your team it's live.

Things that break overflow routing

• Personal voicemail on a tech's or owner's cell picks up before the forward fires. Shorten or turn off voicemail on any phone in the ring group.
• Forwarding from a call-tracking number. If you use tracking numbers for ads, set forwarding at the tracking platform or make sure it passes through, or you'll lose attribution.
• No path back to a human. The AI needs a transfer or text-alert rule for urgent calls, such as gas smells, no heat in freezing weather, or active leaks.

Check it weekly at first

For the first few weeks, review every call the AI handled: why it overflowed, what the AI said, and whether the job got booked. If most overflow is happening during business hours, that's a staffing or ring-time issue worth fixing, not only an AI win.