What Is VoIP, and Why Are Businesses Ditching Landlines?

Most businesses still paying for analog phone lines aren’t doing it on purpose, they just haven’t gotten around to switching yet. Once you understand what is VoIP and how much it actually saves, the reasons to switch stack up fast.

Here’s what VoIP is, how it stacks up against a traditional landline, and what to check before making the switch.

What is VoIP, in plain terms?

VoIP, short for Voice over Internet Protocol, sends phone calls over the internet instead of traditional copper phone lines. Instead of a dedicated phone network, your calls travel as data, the same way a video call or a streaming service does.

For VoIP for business specifically, this usually means a cloud-hosted phone system rather than a physical box in a server closet, with calls handled through desk phones, computers, or mobile apps. Many providers also throw in a mobile app, so a business number rings on a personal phone without giving out a personal number.

How does VoIP work, step by step?

When you make a call, your voice gets converted into digital data packets. Those packets travel over your internet connection to the VoIP provider, which routes the call to its destination, whether that’s another VoIP user or a traditional phone number. The whole process happens in milliseconds, which is why call quality feels just as immediate as a regular phone call, assuming your internet connection is solid.

VoIP vs landline: what actually changes

• Cost. VoIP typically costs less per line, especially for businesses making long-distance or international calls.
• Flexibility. Employees can take business calls from a laptop or phone app anywhere with an internet connection, not just from a desk phone.
• Features. Call routing, voicemail-to-email, auto-attendants, and call analytics come standard with most VoIP for business plans, often at extra cost with landlines.
• Scaling. Adding a new line usually takes minutes through a dashboard, instead of scheduling a technician visit.

The one thing VoIP vs landline comparisons often skip: VoIP depends entirely on your internet connection. A landline still works during an internet or power outage. VoIP generally doesn’t, unless you’ve planned around it.

What to check before switching your business phone system

A few things worth confirming before signing up for a new business phone system:

• Is your internet connection reliable and fast enough to handle call volume alongside everything else your business uses it for?
• Does your provider offer a backup plan for power or internet outages, like automatic call forwarding to mobile phones?
• Are the advertised features (auto-attendant, voicemail-to-email, call recording) included, or billed as add-ons?
• Can it integrate with the tools you already use, like Microsoft Teams or your CRM?

Getting VoIP set up properly

A poorly planned VoIP rollout, especially on a network that hasn’t been checked for bandwidth or configured for voice traffic, causes more headaches than the landline it replaced. Quality of service settings on your router, and a network assessment beforehand, prevent most of the choppy call issues businesses associate with VoIP.

This connects directly to the kind of network planning covered in our piece on reducing meeting overload with smarter IT tools, and the broader thinking behind choosing cloud versus on-premise infrastructure.

For more technical background, Wikipedia’s overview of VoIP technology is a solid starting point.

Frequently asked questions

What is VoIP used for besides phone calls?

Many VoIP systems also handle video calls, team messaging, and conferencing, bundling multiple communication tools into one platform.

Does VoIP work during a power outage?

Not by default. It depends on internet and power staying on, unless you’ve set up mobile call forwarding as a backup.

Is switching to VoIP disruptive for a small business?

Not usually. Most providers port existing phone numbers over, and the switch can often happen with minimal downtime when planned properly. So, what is VoIP worth to a small business in the end? Usually lower monthly costs and far more flexibility than the landline it replaces.

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What is VoIP used for besides phone calls?

Many VoIP systems also handle video calls, team messaging, and conferencing, bundling multiple communication tools into one platform.

Does VoIP work during a power outage?

Not by default. It depends on internet and power staying on, unless you’ve set up mobile call forwarding as a backup.

Is switching to VoIP disruptive for a small business?

Not usually. Most providers port existing phone numbers over, and the switch can often happen with minimal downtime when planned properly.