Types of Auto Dialers For Call Centers

Published 12 April 2025

4 Types of Auto Dialers that Call Centers Use

Table of contents

Are you tired of manually handling outbound calls? Reaching out to customers or prospects can be exhausting and time-consuming, especially when many calls go unanswered. Despite investing extra effort with cold calls and so on, it does not show the expected outcome, impacting your productivity.

One effective solution to save time from manually contacting is using an auto-dialer. It automatically dials the phone numbers from a contact list, which helps to make hundreds of calls in less time.

There are four types of auto dialers for a call center: preview, power, progressive, and predictive auto dialers. Each dialer has unique features, so which one is most suitable for your call center?

💡 Key Highlights

An auto-dialer dials the numbers automatically from the list, minimizing agent time spent on manually contacting the prospects.
The preview dialer tracks customer details, past calls, or additional notes before dialing, allowing agents to engage with customers efficiently.
The power dialer automatically dials the number after the agent finishes the ongoing call.
A progressive dialer dials one number at a time and only connects to the agent when a live person answers.
Predictive dialer calls several numbers simultaneously, even before agents finish their ongoing calls, and routes the live calls to available agents.

Why Is an Auto Dialer Used in a Call Center?

An auto dialer is used in a call center to automate dialing numbers and eliminate the time spent manually contacting customers. It detects and filters out non-productive calls, including unanswered, busy signals, voicemails, and so on, ensuring more live calls are connected. Also, more time can be dedicated to engaging with customers, which results in increased sales and better lead conversion.

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Types of Auto Dialer

Depending on the needs of a business, different types of auto dialers offer unique features to optimize call efficiency, minimize idle time, and increase customer interaction.

1. Preview Dialer

Preview dialer is an automatic dialer that provides the customer’s details, interaction or purchase history, and notes before making a call. It allows them to review relevant details about the client or prospect before making the call.

How do preview dialers work?

Before dialing, the preview dialer shows the customer’s previous interactions. The agent reviews the notes, understands the issue, and makes a well-informed call, improving the chance of a quick resolution.

Pros	Cons
Personalized customer interaction Higher conversion rates Ideal for complex sales	Not Ideal for High-Volume Campaigns Lower Call Volume

2. Power Dialer

A power dialer is an automated calling system that automatically dials phone numbers one at a time, without requiring the agent to initiate the call manually. It ensures that each call is made only after the previous one ends, giving agents full control over their call flow.

How do power dialers work?

When an agent finishes a call, the power dialer automatically begins dialing the next number after a specific time interval. It allows the agent enough time to prepare for the next call. Also, if the call goes to voicemail, is unanswered, or a busy signal, it skips to the next contact.

Pros	Cons
Better control over call flow Simplified Compliance Management Flexible for Small to Medium Teams	Agent idle time Limited Scalability for Large Campaigns

3. Progressive Dialer

A progressive dialer is an automatic dialing system that dials one number at a time and only connects to the agent when a live person answers. It is considered the middle-ground between manual dialing and predictive dialing solutions, reducing call abandonment and increasing efficiency.

How do progressive dialers work?

The system checks if the agent is available before dialing the next number from the list. The dialer detects when a live person answers the call and transfers it to the agent. Once the agent finishes the call, the system will dial the number.

Pros	Cons
Minimized idle time Reduce call abandonment rate	Limited for Time-Sensitive Campaigns Less Flexibility for High-Volume Campaigns

4. Predictive Dialer

Predictive dialer is an automated dialer system that automatically dials multiple numbers simultaneously and connects the live calls to agents. It analyzes past patterns and current data to predict which calls will be answered, and routes the live calls to available agents.

How do predictive dialers work?

Predictive dialer predicts whether agents can handle the call through average call duration, number of agents, and connection rates. Then it dials multiple numbers in advance to ensure that a live call is waiting as soon as an agent becomes available.

Pros	Cons
Increased call volume Higher agent productivity Efficient time management	Abandoned calls Lower call quality Not ideal for complex conversation

Factors to Consider When Choosing an Auto Dialer

When choosing an auto dialer, make sure it fits your current operational needs and supports your goals, maintains compliance, and enhances both agent and customer experiences.

Size of your company - Choose a dialer that offers robust, scalable solutions to handle high call volumes and multiple users, and fits your business size.
Campaign Goal - Define what you are trying to achieve and choose accordingly to the type of calls you will make.
Call Quality and Reliability - Make sure the dialer offers clear audio, high uptime, and handles dropped calls well.
Compliance with Regulations - Ensure the dialer follows laws like TCPA or GDPR to protect your company’s reputation from legal issues.
Cost & Pricing Structure - Compare pricing plans and match your budget and business requirements.

Find the Right Auto-Dialer for You with Calilio

Auto dialers automatically call prospects and connect agents to live calls, helping them boost their productivity and improve customer interactions. There are Preview, Power, Progressive, and predictive auto dialers; each built to support different types of business operations. The best choice depends on your campaign goals, call volume and quality, compliance, and regulations.

Calilio offers a power dialer that automatically dials from a set of listed numbers, ensuring agents connect with more leads in less time without sacrificing quality. Sign up now!!!!

Frequently Asked Questions

How much does an autodialer cost?

An auto dialer costs on average $20 to $150 or more per user per month, depending on the features and provider.

What is the difference between a power dialer and an auto dialer?

A power dialer calls one number at a time and connects agents only when someone picks up. An auto dialer can call multiple numbers simultaneously and connect agents to the first available answer.