What Is a VoIP Phone? A Beginner’s Guide [+ Best Picks]

A VoIP phone is any device that makes calls over the internet using Voice over IP technology, rather than a traditional phone line. VoIP phones range from desk hardware to apps on your existing devices.

If you’ve ever made a phone call through Zoom, Microsoft Teams, or a softphone application instead of a physical desk handset, you’ve already experienced the flexibility of Voice over IP. While hardware models look and feel exactly like a standard office desk setup, shifting the underlying network layer from copper wires to broadband internet completely changes your communication capabilities.

This architectural change unlocks advanced software features — such as virtual number assignments, automated voicemail-to-email routing, video conferencing, native CRM integrations, and the freedom to manage your entire business communications footprint from any global location with internet access.

What Is a VoIP Phone?

A VoIP phone (Voice over Internet Protocol phone) is an endpoint device or application engineered to translate voice signals into digital data packets for real-time transmission over an internet network.

Unlike traditional analog devices that must physically plug into a localized telephone wall jack or an on-premises PBX closet, a VoIP phone registers directly with an internet-based cloud communications provider. Because these endpoints are entirely software-defined, they are highly versatile and take several operational forms:

• Dedicated IP desk phones: Physical desktop hardware that looks like a traditional phone but plugs directly into your internet network via Ethernet or Wi-Fi.
• Desktop softphones: Secure applications installed on a computer or laptop, turning your computer into a full-featured communication hub.
• Mobile VoIP apps: Dedicated smartphone applications that run your professional business lines seamlessly over Wi-Fi or cellular data lines.
• Web-based dialers: Browser-based interfaces that let you make calls directly inside web platforms without downloading any software.

With a virtualized setup, your business phone number is completely decoupled from physical geography. Calls can ring a physical desk phone, a laptop app, and a mobile phone simultaneously, ensuring distributed workforces and remote teams stay perfectly aligned.

VoIP vs. Traditional Phone Systems

The main difference between a VoIP configuration and a legacy landline system is the underlying transit medium. Landlines use dedicated copper lines installed and maintained by local telecommunications utilities at a fixed physical address. VoIP phones bypass this rigid network entirely, routing digital data packets over your existing business broadband.

This fundamental infrastructure shift removes major cost barriers. Businesses no longer need to buy or service expensive on-premises private branch exchange (PBX) hardware systems, pay separate phone line installation fees, or call out technicians just to add a new employee line.

Here’s a detailed comparison between VoIP and landline phones:

How Does a VoIP Phone Work?

A VoIP phone routes voice traffic across the web by establishing an active digital link with your cloud service provider. The underlying process occurs instantly and seamlessly behind the scenes:

• Endpoint service registration: When powered on, the IP phone or application securely authenticates with your cloud service provider using your unique account credentials, letting the network know exactly where to route inbound traffic.
• Call initiation and signaling: When a number is dialed, the phone transmits a digital request via SIP (Session Initiation Protocol) to build the active call session. If the recipient uses a legacy landline, the cloud network seamlessly bridges the call through an automated gateway to connect with the traditional PSTN.
• Voice packetization: As you speak, the device uses specialized software algorithms called codecs (such as G.711 or Opus) to instantly compress your analog voice waves into tiny digital data packets.
• Real-time data transit: These data packets travel dynamically across the internet over standard IP networks, optimizing bandwidth usage in real time.
• Audio reassembly: The receiving hardware or software endpoint captures the arriving data streams, reorders any out-of-sequence packets, and converts them back into high-definition analog audio.

Want to know about the technology behind VoIP? Check out our beginner’s guide to SIP.

Benefits of VoIP Phone Systems

VoIP systems replace the limitations of traditional phone lines and on-site PBX hardware by routing calls over the internet. That gives businesses more flexibility, richer calling features, and simpler management — all without relying on physical phone wiring.

Here are the top benefits of using a VoIP phone system:

• Streamlined setup and integration: Bypasses complex physical installations. The entire system deploys over your existing broadband connection and integrates natively with collaboration suites like Microsoft Teams or sales tools like Salesforce.
• Dynamic number linking: Allows organizations to create virtual regional phone numbers anywhere. You can easily link multiple regional numbers directly to specific users, hunt groups, or departments while keeping your original phone numbers through free number porting.
• Professional mobility: Employees can make and receive calls on laptops, desk phones, or mobile apps interchangeably while maintaining a singular corporate caller ID.
• Advanced inbound management: Delivers sophisticated calling tools standard, including multi-level auto attendants, smart call routing configurations, automated voicemail-to-email delivery, and built-in video conferencing rooms.
• Scalability and financial ROI: Scale your line presence up or down instantly through a cloud dashboard without scheduling technician house calls or buying on-premises server equipment, significantly lowering ongoing maintenance overhead.

Businesses like VoIP because it’s easier to scale (vs. traditional landlines) and add phone numbers as your team grows. VoIP has easy installation: You don’t need technicians to come out to install physical phone lines — you only need an existing broadband connection and a VoIP provider.

Note: Sometimes, businesses prefer to retrofit an existing PBX to a cloud-based system rather than switching entirely to a VoIP phone system. This type of migration relies on SIP trunking to connect phone calls over IP networks. SIP is commonly used as a control protocol in VoIP technology, ensuring efficient call management and connectivity.

VoIP Phone Equipment & Top Picks (2026)

VoIP phone equipment generally falls into two categories: hard phones (dedicated physical desktop handsets) and softphones (software apps running on computers or smartphones). Most growing organizations use a mix of both to fit individual employee workflows.

By the way, if you choose Nextiva for your cloud phone system, you will get a softphone included in your package. Nextiva also offers a variety of certified VoIP phones and equipment guaranteed to work for your needs.

Best picks for VoIP phones

We’ve assembled a chart showing the most popular VoIP phones on the market to make the decision process easy. All of these models have been tested and reviewed, and each has been benchmarked to the highest industry standards.

Remember that countless other models are available (some with either more advanced features or additional lines). Here’s a more comprehensive list of the best business VoIP phones.

What Type of VoIP Phone Does My Business Need?

In the end, you cannot go wrong with any of these popular devices. You’ll notice that each offers the features you would expect from a phone system.

Here are the primary requirements to consider before choosing a device.

Consider the brand reputation

Think about longevity and past performance. Are there names you trust more than others? For example:

• Poly is the global leader in effective business communication with colleagues, partners, customers, and prospects. You can’t look at a serious VoIP solution without including its product line in your decision-making process.
• Cisco is a prominent name in business networks and internet infrastructure, and a leading player in the VoIP hardware market.
• Panasonic is one of the world’s leading innovators in VoIP phone business systems. Their reputation for producing high-quality electronic devices dates back decades.
• VTech is the world’s largest manufacturer of cordless phones and is well known for its electronic educational toys.

Consider the number of line registrations

How many lines does each VoIP phone in your office need to handle? Some team members will need many more than two lines. Likewise, look at how many line appearances you can see on the screen so you know if another user’s line is available.

Consider whether you use headsets

What type of connectors do they have? An RJ-9 is a familiar type of connector for telephones but is less popular. Today’s headsets use USB for connectivity. If you need Bluetooth, then make sure your device supports it. Some devices require a USB-to-Bluetooth dongle that might not be included.

Consider Power over Ethernet (PoE)

Most Voice over IP phones now support PoE, but make sure you have the power adapters, since most employees working from home do not have PoE-capable network equipment. Cloud VoIP services simplify management, enabling faster onboarding and easier user management, which is especially beneficial for remote or hybrid work setups.

Don’t forget about reliability

Does the phone receive regular security updates? VoIP phones that receive these updates tend to be more reliable than devices that need firmware delivered by hand. (Hint: Many, many internet-connected devices never get updated.)

Growth Starts With Reliable Communications: Nextiva VoIP

Behind every successful sale, client support call, and strategic discussion is a reliable business phone system. When your business depends on staying connected, Nextiva’s flexible VoIP platform empowers your team to work from any location, scale on demand, and deliver an exceptional customer experience.

With Nextiva’s cloud-native solution, you can quickly add new users, build out smart call routing paths, and sync your communication history with your daily business tools — completely bypassing complex hardware management. Preconfigured desk phones or intuitive softphone apps get most teams up and running in minutes.

Speak with a Nextiva specialist today to design a communication framework that supports your business now and adapts to your growth tomorrow.

VoIP Phone FAQs

Got questions about VoIP? Don’t worry. You’re not alone. Here are our answers to the most frequently asked questions about VoIP phones.