{"id":11657,"date":"2026-10-27T18:47:28","date_gmt":"2026-10-27T17:47:28","guid":{"rendered":"https:\/\/business.onoff.app\/?p=11657"},"modified":"2026-10-27T18:50:07","modified_gmt":"2026-10-27T17:50:07","slug":"voip-vs-landline","status":"publish","type":"post","link":"https:\/\/business.onoff.app\/en\/blog\/technology-telecoms\/voip-vs-landline\/","title":{"rendered":"VoIP vs landline: what’s the difference, and which is better for your business?"},"content":{"rendered":"\t\t
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VoIP vs landline: the key differences, pros and cons, and which suits your business<\/h1>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Whether you are replacing an ageing phone system or setting one up for the first time, the choice shapes how customers reach you, how your team works and what you spend each month. For most UK businesses it comes down to VoIP or a landline.<\/span><\/p>

A landline carries calls over a physical line to a fixed socket, and its strength has always been predictability. VoIP carries calls over the internet, so the same business number can ring on a desk phone, a laptop or a mobile. It costs less to scale, takes minutes to change and suits teams that are not all in one room.<\/span><\/p>

This guide explains how each works, compares them on eight points that matter day to day, and shows which setup fits which kind of business. One UK fact frames the decision: the copper telephone network closes on 31\/01\/2027, so most traditional landlines will become digital lines whatever their owners decide. The final section covers what that means in practice.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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VoIP vs landline: the key differences at a glance<\/b><\/h2>
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VoIP<\/b><\/p><\/td>

Landline<\/b><\/p><\/td><\/tr>

How it works<\/span><\/p><\/td>

Calls travel as data over an internet connection<\/span><\/p><\/td>

Calls travel as an analogue signal over copper to the exchange<\/span><\/p><\/td><\/tr>

Mobility<\/span><\/p><\/td>

Answer and make calls on a mobile, laptop or desk phone, anywhere with a connection<\/span><\/p><\/td>

Calls ring at the socket; nothing follows you out of the building<\/span><\/p><\/td><\/tr>

Cost<\/span><\/p><\/td>

Per-user monthly subscription; little or no hardware<\/span><\/p><\/td>

Line rental per line, call charges, PBX purchase and maintenance<\/span><\/p><\/td><\/tr>

Setup<\/span><\/p><\/td>

Minutes for a new number in an app; no engineer needed<\/span><\/p><\/td>

Engineer visit, wiring, and handsets for every line<\/span><\/p><\/td><\/tr>

Scalability<\/span><\/p><\/td>

Add or remove users and numbers from a dashboard<\/span><\/p><\/td>

Each new line is a new order and often new wiring<\/span><\/p><\/td><\/tr>

Features<\/span><\/p><\/td>

Routing, IVR, recording, analytics, CRM integration, multiple numbers per phone<\/span><\/p><\/td>

Calls, voicemail, caller ID; anything more needs extra hardware<\/span><\/p><\/td><\/tr>

Security<\/span><\/p><\/td>

Encryption and access controls managed by the provider<\/span><\/p><\/td>

Physically secure line; any PBX security is your responsibility<\/span><\/p><\/td><\/tr>

Reliability<\/span><\/p><\/td>

Depends on the connection; calls can fail over to mobiles<\/span><\/p><\/td>

Independent of the internet; a line fault or PBX failure stops all calls<\/span><\/p><\/td><\/tr>

Call quality<\/span><\/p><\/td>

Clear on a stable connection<\/span><\/p><\/td>

Clear on good copper; ageing lines crackle<\/span><\/p><\/td><\/tr>

Future in the UK<\/span><\/p><\/td>

The standard for all phone lines<\/span><\/p><\/td>

The PSTN closes on 31\/01\/2027<\/span><\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What is VoIP?<\/b><\/h2>

Voice over Internet Protocol, or VoIP, is the technology that carries phone calls over an internet connection instead of a traditional phone line. If you have made a call on Teams or WhatsApp, you have used VoIP.<\/span><\/p>

A business VoIP system is software. Your team installs the provider’s app on their mobiles and laptops (often called a softphone), or plugs IP desk phones into the office network, and each user gets one or more business numbers. Those can be ordinary UK numbers: an 020 London or 0161 Manchester geographic number, a non-geographic 03 number, or a 07 mobile number.<\/span><\/p>

Most business VoIP systems include features a traditional phone line cannot offer:<\/span><\/p>