Call overflow

Call overflow is what happens when more calls arrive than a business can answer at once, so the extra calls are diverted to another line, an answering service, or automated handling.

Overflow occurs during busy periods, staff shortages, or sudden spikes in demand, when every line is already in use. Without a plan for it, these calls go unanswered and become missed opportunities. Businesses often route overflow to a call answering service or an AI receptionist that can pick up the extra volume, qualify each caller, and book or message follow-ups.