A predictive dialer is outbound calling software that dials several numbers for each available agent. It predicts how many calls will be answered and when agents will be free, so agents spend less time listening to rings and voicemail.
The cost is calls that are answered with no agent ready. These abandoned or silent calls are what regulators limit. "Auto dialer" is the wider name for any system that dials numbers automatically, and "AI dialer" covers several newer products described below.
How a predictive dialer works
The dialer takes a list of numbers for a campaign. A pacing algorithm watches answer rates, handle times and agent states, and decides how many calls to place at any moment.
Genesys documentation describes its predictive mode as one that predicts agent availability and places calls before agents finish their current work. This is vendor documentation; other dialers use their own algorithms.
Call analysis then sorts the outcomes: busy, no answer, answering machine, or a live person. Live answers go to an agent. When no agent is free in time, the call is abandoned.
Predictive, power, progressive, preview and AI dialers compared
Names vary between vendors, so it helps to check what each mode does in your platform. The definitions below follow the Genesys page.
Preview dialer. The agent sees the customer record first and starts each call. Genesys describes it for high-value contacts. It suits late-stage collections, complaints and complex renewals.
Progressive dialer. The system dials one contact for each available agent. Agents still wait through rings, but a free agent is ready for every answer.
Power dialer. It also waits until an agent is available, then adjusts how many calls it places per agent. Genesys says it slows down when it reaches a configured abandonment threshold.
Predictive dialer. It dials ahead of agent availability. It usually gives the most talk time per agent hour and carries the highest abandonment risk.
AI dialer. The term covers two different things. Some products add AI to a classic dialer for list order, best time to call or answering machine detection. Others put an AI voice agent (a voicebot) on the call itself, which brings the rules for artificial voices into play.
Abandoned call rules
In the US, 47 CFR 64.1200(a)(7) and the FTC's Telemarketing Sales Rule set the main limits for telemarketing.
3% limit. No more than 3% of calls answered by a person may be abandoned, measured per campaign over each 30-day period.
2-second connect rule. A call counts as abandoned if no live sales representative joins within two seconds of the person's completed greeting.
Message. If no representative joins in time, the caller must hear a short recorded message with the seller's name and phone number. The FCC rule also requires an automated way to opt out.
Ring time. An unanswered call must ring for at least 15 seconds or four rings.
The FCC rule also requires records that show compliance. The FCC amends these rules from time to time, so it is worth checking the current text.
In the UK, PECR regulation 19 requires consent for recorded marketing calls by an automated system. In the EU, rules vary by member state.
Frequently asked questions
What is the difference between an auto dialer and a predictive dialer?
"Auto dialer" is the umbrella term for software that dials automatically, and a predictive dialer is one type. In US law the term is narrower. The Supreme Court's Facebook v. Duguid ruling of April 1, 2021 requires the capacity to use a random or sequential number generator. A dialer that only calls a stored customer list may fall outside that definition, though abandonment and artificial voice rules may still apply.
What is an AI dialer?
It is a marketing term with two meanings. One is a classic dialer with AI pacing, list scoring or answering machine detection. The other is an AI voice agent that speaks to the customer. The FCC confirmed in Declaratory Ruling FCC 24-17 that AI-generated voices are artificial voices, so those calls need the called party's prior express consent.
Do auto dialer calls need consent?
In the US, calls to mobile numbers made with an autodialer or an artificial or prerecorded voice need prior express consent, with some exceptions. Marketing calls with a prerecorded or artificial voice face stricter written consent rules. Since the rules depend on the call's purpose and the equipment, it is worth checking each campaign with counsel.
When should a collections team use preview instead of predictive dialing?
Preview fits accounts where the agent needs to read the history first, such as disputes, hardship cases or large balances. Predictive fits large lists of early-stage reminders where most calls are short. Many teams run both, split by segment and stage.
How we approach this at Zowie
Zowie's AI agents work on voice, chat, and email, with over 100 million conversations a year across our clients. Once a customer is on the line, the language model speaks. A separate, deterministic Decision Engine returns every amount, rate, offer, disclosure, and escalation from your rules, with an audit log. To see it on your own call types, you are welcome to book a demo.
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