VoIP vs Landline Phone Services: What's the Difference?

Updated 23 October 2026 · Advinne editorial team · 7 min read

Compare VoIP and landline phone services to find the best fit for your needs. Consider factors like reliability, features, and security.

The main difference between VoIP and landline phone services is that VoIP uses internet connection for calls, while landlines use physical phone lines. Both options have their advantages and disadvantages. Here's a fair comparison of VoIP and landline pros and cons to help you decide.

Quick answer

VoIP and landline phone services are two distinct options for connecting your home or business to the public switched telephone network. The key differences between them lie in their infrastructure, reliability, and features.

Infrastructure

VoIP uses internet connectivity to transmit voice calls over the internet, while landline services rely on traditional copper or fiber-optic cables to connect calls directly to the public switched telephone network.

Reliability

Landline services are generally more reliable and less prone to outages, as they are less dependent on internet connectivity. VoIP services, on the other hand, can be affected by internet outages or poor internet quality.

Features

  • VoIP services often offer advanced features such as call forwarding, voicemail, and video conferencing, while landline services typically provide basic call and text features.
  • VoIP services can be more flexible and scalable, making them suitable for businesses with changing needs.
  • Landline services can be more secure and reliable, making them a better choice for critical communication needs.

In summary, the choice between VoIP and landline services depends on your specific needs and circumstances.

How each option works

VoIP Phone Service

VoIP (Voice over Internet Protocol) phone service uses the internet to make and receive calls. This technology converts your voice into digital data packets, which are transmitted over the internet to the recipient's phone or computer. VoIP phone service relies on a stable internet connection, which can be provided by a broadband internet service provider (ISP) or a mobile network operator.

Landline Phone Service

Landline phone service, on the other hand, uses traditional copper wires or fiber-optic cables to connect your phone to the public switched telephone network (PSTN). When you make a call, your voice is transmitted over these wires to the recipient's phone. Landline phone service is often provided by a local exchange carrier or a telephone company.

  • Key infrastructure used by each option:
  • VoIP: internet connection, VoIP adapter or IP phone, internet service provider (ISP)
  • Landline: copper wires or fiber-optic cables, local exchange carrier or telephone company, PSTN

Key differences at a glance

What sets them apart

VoIP and landline services differ in their underlying technology, infrastructure, and functionality. This impacts how you use, pay for, and maintain each service.

Key differences in a nutshell

  • Infrastructure: Landlines use traditional copper or fiber-optic cables, while VoIP relies on internet connectivity via broadband or Wi-Fi.
  • Call quality: Landlines are generally less prone to call drops and echo, whereas VoIP can be affected by internet speed and quality.
  • Cost: VoIP can be more cost-effective for long-distance calls and international calls, but landlines may be more budget-friendly for local calls.
  • Mobility: VoIP allows for remote work and flexibility, while landlines are tied to a fixed location.
  • Additional features: VoIP often includes features like video conferencing, call recording, and online management, which may require additional fees or equipment with landlines.

Pros and cons of each

VoIP Phone Service

VoIP phone service offers several advantages, including lower costs compared to traditional landline phone services. With VoIP, you can make long-distance calls at a significantly lower rate, and some providers offer unlimited calling plans. Additionally, VoIP services often come with a range of features, such as call waiting, call forwarding, and voicemail.

  • Reliability can be affected by internet connectivity issues
  • Quality of service may vary depending on internet speed
  • May require additional equipment or software
  • Security risks if not properly configured

Landline Phone Service

Landline phone services have several benefits, including a more established and reliable connection. Landlines are less susceptible to outages and disruptions caused by internet connectivity issues. However, they often come with higher costs and may not offer the same range of features as VoIP services.

  • More reliable and less prone to outages
  • No need for internet connection
  • Established network and infrastructure
  • May not offer the same range of features as VoIP services

To get the most out of a VoIP service, consider investing in a VoIP adapter for your landline, such as a device that allows you to make Voice Calls Over the Internet with a VoIP Adapter for Landline.

Which should you choose?

Consider your needs

VoIP and landline phone services cater to different needs and preferences. If you prioritize reliability and traditional phone features, a landline might be the better choice. On the other hand, if you're looking for flexibility, cost savings, and advanced features, VoIP could be the way to go.

Assess your lifestyle

  • If you frequently travel or work remotely, VoIP's portability and mobility features make it a more suitable option.
  • If you're a home-based business owner or entrepreneur, VoIP's scalability and customization options can help you manage multiple lines and extensions.
  • If you have a large household or family, a landline's reliability and clear call quality might be more important for everyday communication.

Evaluate your technology comfort level

Consider your comfort level with technology and the complexity of setting up and managing a VoIP system. If you're not tech-savvy, a landline might be a more straightforward choice. However, if you're comfortable with technology and want to take advantage of VoIP's advanced features, it could be worth the extra effort.

How to switch

Preparing to switch

Before making the switch, assess your current landline setup and determine what features you need to replicate with VoIP or vice versa. Consider factors such as the number of phone lines, call quality, and any additional features like call forwarding or voicemail.

Setting up VoIP

To switch to VoIP, you'll need a VoIP adapter or a VoIP-enabled router. Check your internet speed to ensure it meets the recommended requirements for VoIP service, which is typically 100 Kbps for voice and 1 Mbps for video. You can check your internet speed with a Free VoIP speed test.

  • Install the VoIP adapter or router according to the manufacturer's instructions.
  • Configure your VoIP settings, including your VoIP service provider's details and any required port forwarding.
  • Connect your phone to the VoIP adapter or router and test the service.

Switching from VoIP to landline

To switch from VoIP to a landline, you'll need to disconnect your VoIP service and install a traditional landline phone. You may need to hire a professional to install the landline phone and connect it to your existing wiring.

  • Disconnect your VoIP service by contacting your provider.
  • Install the landline phone and connect it to your existing wiring.
  • Test the landline service to ensure it's working properly.

Frequently asked questions

What is VoIP and how does it differ from a landline?

VoIP (Voice over Internet Protocol) is a phone service that uses the internet to make calls, whereas a landline uses traditional phone lines. VoIP is often cheaper and more flexible, but can be affected by internet connectivity.

How does VoIP affect call quality?

Call quality with VoIP can be affected by internet speed and connectivity issues, such as packet loss or latency. This can result in dropped calls, echo, or poor sound quality. To mitigate this, choose a VoIP provider that prioritizes voice traffic and consider using a wired internet connection.

Can I keep my landline number with VoIP?

Yes, many VoIP providers allow you to port your existing landline number to their service. This can be done through your provider's customer support or online portal.

What are the potential costs associated with VoIP?

Check current prices for VoIP plans, which can vary depending on the provider and features. Some VoIP providers charge for additional features, such as call recording or international calls.

  • What are some common mistakes to avoid when switching to VoIP?
  • Not checking internet speed and connectivity before signing up
  • Not understanding the terms and conditions of your contract
  • Not testing call quality before making the switch
  • Not considering the reliability of your internet service provider
  • Not reading reviews and doing research on the VoIP provider before signing up

FAQ

Is VoIP more reliable than landline?

VoIP can be affected by internet outages or poor internet quality, making landlines generally more reliable. However, VoIP services can be more flexible and scalable. The choice depends on your specific needs and circumstances.

Can I use VoIP without internet?

No, VoIP requires a stable internet connection to work. If your internet is down, you won't be able to make or receive VoIP calls.

Do VoIP services offer video conferencing?

Yes, many VoIP services offer advanced features like video conferencing, call forwarding, and voicemail. Check with your provider to see what features are included.

Is VoIP more secure than landline?

VoIP and landline services have different security risks. VoIP can be vulnerable to hacking, while landlines are generally more secure. Consider your specific needs and choose accordingly.

Can I keep my landline number with VoIP?

Yes, many VoIP providers allow you to port your existing landline number to their service. Check with your provider for specific requirements and fees.

Do I need a special phone for VoIP?

No, you can use a standard phone with VoIP, but you may need a VoIP adapter or a phone specifically designed for VoIP. Check with your provider for recommendations.

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How we write: we explain the technology in plain English and compare providers on published features. We do not invent prices; plans change often, so check current pricing with each provider. Some links may earn us a commission at no cost to you (see our affiliate disclosure).