Auto dialers: types, strategies, and how to choose the best one for your call center campaigns

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Date of publication
17/9/2025
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Not so long ago, phone campaigns relied on agents dialing number by number, waiting for a tone, writing down results, and repeating the process over and over again. Today, that image belongs to the past thanks to auto dialers, which allow companies to multiply their contact capacity without increasing human resources.

This technology, integrated into contact center solutions like Inconnect, manages lists, applies dialing rules, and optimizes each agent’s time. And when combined whit virtual agents such as Inagent, it makes it possible to automate complete processes, from an IVR, bot, or ourbound AI agent, depending on the required accuracy, to entire telesales or reminder campaigns, with a level of precision and agility that once seemed impossible.

The result is not only higher campaign performance but also a better customer experience and operations that can adapt to any strategy, whether outbound, inbound, or mixed.

What is an auto dialer?

An auto dialer is a system that manages contact lists and applies dialing rules to automate calls to customers or prospects. The goal is to eliminate repetitive tasks (such as dialing manually, waiting for a tone, or logging results) so agents can dedicate their time exclusively to speaking with real people.

Its effectiveness largely depends on:

  • Database quality: correct and up-to-date phone numbers.
  • Dialing rules: contact order, number of retries, schedules, etc.
  • Exclusion lists (“do not call”), to comply with regulations and protect the customer experience.

Types of auto dialers

There are different dialing strategies, and choosing the right one depends on the campaign’s goal, the number of agents, and the quality of the database.

1. Predictive dialer

It uses algorithms that predict when an agent will be available for the next call, dialing before the current one ends.

  • Advantages: it can reach up to 80% occupancy per hour, maximizing productivity.
  • Risks: if the prediction fails, it may generate abandoned calls or idle time.
  • Best for: campaigns with more than 20 agents, similar conversation times, and high-quality databases.

2. Progressive dialer

It only dials when an agent is available, avoiding abandoned calls.

  • Advantages: eliminates the risk of annoying calls for the customer.
  • Disadvantages: slightly lower productivity compared to predictive dialers.
  • Best for: campaigns with fewer than 20 agents or lower-quality databases.

3. Preview dialer

It presents the agent with the contact’s information before the call, allowing for prior analysis.

  • Best for: segmented lists or customers with complex cases (e.g., managing old debts).
  • Focus: prioritizes conversation quality over speed.

4. Outbound IVR or voice broadcasting

It automates the call to deliver a prerecorded or interactive message.

  • Use cases: allows menu options, surveys, appointment reminders, promotions, or “press-1” campaigns to transfer to the contact center.
  • With Inagent: these IVRs reach a higher level of precision in their automated operation, since they include conversational AI to answer questions and process interactions without human intervention.

Outbound vs inbound: not all campaigns are the same

In practice, auto dialing is used in two main scenarios, and each requires a different approach:

In outbound campaigns, the more traditional approach, the process starts from a contact list and moves forward call by call according to dialing rules. This is the usual strategy in telesales, Collection, surveys or direct marketing, where the objective is to maximize the number of effective interactions in the shortest possible time.

Inbound automated campaigns, on the other hand, work differently: the call originates from a customer action, such as clicking a click-to-call button or submitting a web form. Here, the key is to respond immediately, since customer interest is at its peak at the very moment they request contact. In inbound telemarketing, strategies, this immediacy can be decisive for achieving conversion, and examples like Verisure UK show that a quick response makes it possible to reach very high contact rates.

How to choose the best auto dialer for your campaign

The truth is that there is no single formula: the choice should be based on an analysis of resources, objectives, and the characteristics of the database.

Some key points to keep in mind are:

1. Volume and availability of agents

If you have many agents working at the same time, a more aggressive dialer can boost productivity. If the team is smaller, it may be better to use a slower-paced system to avoid overwhelming them.

2. Database quality and segmentation

A well-segmented database with reliable data allows for faster dialing. If the information is limited or inconsistent, it is better to use a dialer that can filter and prioritize.

3. Expected call duration

If calls are usually short, a predictive dialer can chain together more contacts in less time. On the other hand, if conversations are longer or require detailed explanations, a progressive dialer is more suitable to space out the calls.

4. Need for prior analysis

There are campaigns where you cannot call “blind”. If you need to review information before each contact, the dialer should give you time and control to do so, which makes a preview dialer the better option.

We could say the challenge lies in finding the right balance: maximizing productivity without overwhelming agents, while always complying with regulations. In complex operations, a mixed strategy that combines different types of dialing, adapting them to each moment and need, often works best.

The right call at the perfect moment thanks to every type of auto dialer

Auto dialers remain one of the most profitable investments for any phone campaign, as long as the right strategy is chosen. The key lies in combining technology, data, and expertise so that every interaction happens with the right person at the right time.

With Inconnect, it is not only possible to automate and optimize dialing but also to integrate it with Inagent so AI agents can automate part of the work. This way, companies can ensure the right call at the perfect moment, while reducing costs, improving the experience, and accelerating results.

In the end, it is about making the most of every contact opportunity to create value, build relationships, and strengthen customer connections. Do you have questions about your dialing strategy? Get in touch with us and one of our specialists will analyze your case to find the best solution for your call center campaigns.

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