TL;DR
- Every dialing mode answers one question: how many numbers to dial per available rep. Preview dials zero until the rep decides, Power dials one, Progressive dials one or more but only when a rep is free, and Predictive dials several based on a prediction.
- The more numbers you dial per rep, the less the rep waits, and the higher the risk of an answered call with nobody to take it: an abandoned call.
- An abandoned call is a burned lead: the customer answered, heard silence and hung up, and next time they will not pick up. In the US and the UK, regulation caps abandoned calls at about 3% of answered calls.
- For most floors in Israel, between 5 and 50 reps, Power or Progressive with smart prioritization delivers most of Predictive's gain without its cost.
A dialing mode is the rule an auto-dialer uses to decide how many numbers to dial and when. There are four standard modes: Preview, Power, Progressive and Predictive. The difference looks technical, but it sets three things a floor manager feels every day: how long a rep waits between calls, how many customers hear silence when they answer, and how fast the lead list burns.
The core tension: rep time vs customer experience
Dial one number per rep and, if it goes unanswered, the rep waits. Dial three numbers per rep and, if two answer at once, one customer picks up a call with nobody on it. Every dialing mode is a different point on that axis. No mode wins on every floor; there is a mode that fits your team size, your answer rates and your type of call.
Preview: the rep sees first, then decides when to dial
The system shows the rep the lead card, the history and the notes, and the rep clicks dial when ready, or the system dials on its own after a short countdown. It is the slowest mode, but it protects quality where every call is expensive: selling to business customers, calling back after a price quote, or a retention call that requires knowing the history. Zero abandoned calls, and the highest rep wait time.
Power: one number, automatically, the moment the rep is free
When the rep finishes a call and marks a status, the system immediately dials the next lead in the queue. One number per rep means no abandoned calls, but the rep still hears the rings of every unanswered attempt. On a floor with reasonable answer rates, Power alone already doubles talk time compared to manual dialing, and it is the mode most small and mid-size floors should start with.
Progressive: dial only when someone is there to answer
Progressive dials only when a rep is free, but it can dial several numbers in parallel for that rep, filtering out busy signals, voicemails and disconnected numbers in the background. The rep gets only answered calls and hears far fewer rings. With the ratio set correctly, abandoned calls are rare, because the system never dials for a rep who is not free yet. This is the balance most smart dialers are built on.
Predictive: statistical prediction, maximum speed, and a price
Predictive dials numbers before a rep is free, based on a prediction: the expected answer rate and the average call length. When the prediction is accurate, the rep finishes a call and gets the next one immediately, with zero wait time. When it is not, a customer answers and no rep is free. The call is abandoned or the customer hears a few seconds of silence, and that is exactly the moment customers mark a number as spam. The prediction works well only at large volumes, dozens of reps or more on the same campaign, because only there do the statistics stabilize.
What regulators around the world say about abandoned calls
In the US, FCC rules under the TCPA cap abandoned calls at 3% of answered calls per campaign over a 30-day period, and require connecting the customer to a live rep within two seconds of the end of their greeting (47 CFR 64.1200). The UK regulator Ofcom also sets a 3% threshold. Israel currently has no equivalent numeric threshold, but the business logic is the same: every abandoned call is a lead that is harder to reach next time.
The full comparison
| Preview | Power | Progressive | Predictive | |
|---|---|---|---|---|
| Numbers per available rep | 0 until the rep decides | 1 | 1 or more, only when a rep is free | Several, based on prediction |
| Rep wait time | High | Medium | Low | Lowest |
| Abandoned-call risk | None | None | Very low | High, depends on calibration |
| Right team size | Any size | 1 and up | 5 and up | 30 to 50 and up per campaign |
| Right call type | Complex, high value | Most sales calls | Most sales and service calls | High volume, low value per call |
| Impact on number reputation | Minimal | Low | Low | High if there are silent calls |
How to choose: three questions
- How many reps dial the same campaign at the same time? Under 30, Predictive will barely gain anything over a good Progressive setup.
- What is one lead worth? If you paid tens or hundreds of shekels for it, an abandoned call costs more than you save in wait time.
- How much preparation does each call need? If the rep has to read the history before saying hello, use Preview, or Power with the lead card shown in advance.
What matters more than the dialing mode
Managers tend to focus on the dialing mode because it is the most visible number on the spec sheet. In practice, two things affect the result more: the dialing order and what happens after the call. A Power dialer that first calls the lead who came in a minute ago, and retries no-answers at the hour they tend to pick up, will beat a Predictive dialer that dials in list order. And a dialer where the rep types for two minutes after every call loses what it gained in wait time. That is why Saleso Live focuses on automatic dialing that connects only answered calls, together with prioritization, dialing strategy and automatic call summaries, not on squeezing more numbers into every second.
Frequently asked questions
What is the difference between a power dialer and a predictive dialer?
A power dialer dials one number per rep, the moment the rep is free, so there are no abandoned calls. A predictive dialer dials several numbers before the rep is free, based on statistical prediction, so wait time is lower but some customers answer a call with no rep on it.
What is an abandoned call?
A call the customer answered that was not connected to a rep in time, because all the reps were busy. The customer hears silence or a disconnect. It happens almost only with predictive dialing, and it hurts both the lead itself and the reputation of the outbound number.
Which dialing mode fits a floor of 10 reps?
Power or Progressive. At that size Predictive's prediction does not stabilize, and it produces abandoned calls without a meaningful time gain. Most of the improvement comes from lead prioritization, voicemail filtering and automatic logging.
Which dialing mode does Saleso use?
Saleso Live dials automatically and passes the rep only answered calls, following a dialing strategy your floor defines: priority order, attempts per lead, intervals and rotating numbers. The goal is zero dead time for the rep without burning leads on abandoned calls.