A predictive dialer places calls on behalf of a pool of agents, using an algorithm to dial ahead of who is available on the assumption that most calls will go unanswered. It is a call-centre instrument, and it is what the FTC’s abandoned-call rules were written for.
The distinguishing feature is dialing ahead of availability. A predictive dialer deliberately places more calls than it has free agents, modelling how many will fail to connect. When the model is wrong, someone answers and finds silence — which is precisely the abandoned call that 16 CFR 310.4 prohibits.
This is why the 3% safe harbour exists, and why predictive dialing is largely confined to consumer campaigns run at a scale where the statistics are stable. A parallel dialer, by contrast, opens its lines for one named rep who is already waiting; it can still abandon calls, but its exposure comes from simultaneous answers rather than from a forecast.
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