The UK is in the midst of a significant telephone revolution. By January 2027, BT and other providers will have completed the switch-off of the old PSTN (Public Switched Telephone Network). That means traditional copper landlines won’t work. If you’re still using an old-fashioned home phone, it is finally time to switch to VoIP.
Whether you’re a remote worker who needs to maintain a professional appearance, a freelancer who wants to keep business and personal calls separate, or someone just looking to reduce phone bills, knowing how to set up a VoIP system at home is something that will still be worthwhile in 2026.
The good news? It’s a lot easier than most people assume. In this step-by-step guide, we’ll take you through everything from what VoIP even is and the equipment you need to how to test your setup once it’s running. By the time we’re done, you’ll know exactly what you need to do to set up your home VoIP system.
What Is A VoIP System?
The acronym VoIP means Voice over Internet Protocol. Simply put, it’s a technology that allows you to use your broadband internet connection instead of an old-fashioned phone line to place and receive telephone calls.
If you speak into a VoIP phone, for example, your voice is turned into little packets of digital data. That packet travels over the internet to the person you’re calling, where they get reassembled and turned back into sound. All this processing occurs in real time, so the experience is similar to a normal phone call, but with better audio quality.
Here’s why this approach is important in 2026:
- Classic landlines rely on old copper wiring infrastructure, which is being phased out across the UK.
- VoIP uses your existing broadband; no separate phone line is necessary.
- VoIP calls, particularly to UK numbers and all-around international calling, are much cheaper than making a traditional landline call.
- VoIP systems are rich in features, including voicemail-to-email, call forwarding, call recording, and virtual numbers.
- VoIP isn’t a new technology, but better broadband speeds, superior hardware and the forthcoming landline switch-off have made it an option of choice for homes and businesses alike across the UK.
Want to learn more about the difference between landline and VoIP? Then see our guide: VoIP vs Landline Phones: Which is Best For Your Business?
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Can I Use A VoIP Phone At Home?
Absolutely. VoIP is no longer confined to the office. Millions of UK households and home-based workers already use VoIP systems, and recently, the setup process has become significantly more accessible.
You can use a VoIP phone at home as long as:
- You have a working broadband connection (fibre is best, but basic ADSL can work for simple calls).
- You also have a compatible device; this can be a dedicated IP phone, an ordinary phone connected to an adapter or even simply a laptop or smartphone with softphone software.
- You register with a VoIP service provider that assigns you a UK number along with SIP credentials to link your device.
VoIP at home doesn’t require you to obtain any special licences, either, and neither will you have to open up a business account. The prices are often very low; some providers offer home-specific plans from just £5 a month, which gives you a UK phone number and standard calling features.
Learn more about VoIP and ADSL in our guide: Leased Line vs ADSL: What’s the Difference? (Updated 2026)
Which Equipment Do I Need To Set Up A VoIP Phone System At Home?
One of the most asked questions from people who are not sure about setting up a VoIP system at home is, ‘Do I have to buy expensive equipment?’ The answer is ‘no’.
Here’s a breakdown of what you will need:
1. A Reliable Broadband Connection
This is the core component of any home VoIP setup. You don’t need a business-grade connection, but your broadband should be stable and speedy enough to bear voice data without drops or lag time.
- Minimum recommended speed: 10 Mbps download and 1 Mbps upload (for one user).
- Each simultaneous VoIP call has a bandwidth consumption of around 100 kbps.
- Fibre broadband (FTTP or FTTC) quality of calls is preferable.
- For VoIP, wired Ethernet connections are more stable than WiFi. This matters less if your broadband is fast.
2. A VoIP Device
In terms of hardware, you have three primary choices:
Option A: Dedicated IP Phone:
Manufacturers such as Yealink, Cisco, and Polycom design VoIP desk phones specifically for an Ethernet connection to your router. These give the experience of a landline office phone, and they work great if you want something that feels reliable and is always on.
Option B: Analogue Telephone Adapter (ATA):
If you already have a landline-style phone, an ATA adapter simply allows you to plug it in and continue using it over VoIP. The device plugs into your router and your phone to convert analogue signals into digital. You can get ATAs from around £20 to £60.
Option C: Softphone App:
A softphone is an application that you download and install on your laptop, desktop, or smartphone. No extra hardware is needed. After you configure it with your provider’s SIP credentials, you will be able to receive and make phone calls from any device. Zoiper, Linphone, and MicroSIP are popular softphones.
3. A VoIP Service Provider
To get a UK phone number (along with SIP login details that connect your device to the network), you’ll have to sign up with a reputable VoIP provider. When comparing providers, look at:
- Recurring fees and per-user or per-minute charges
- If you can keep your number (number porting)
- Included features of the plans (voicemail, call forwarding, call recording)
- Quality of UK customer support
- Contract length and flexibility
ComparedBusiness UK helps you easily compare quotes side by side so that you can find the right plan for your needs without spending hours researching plans from different UK VoIP providers.
4. A Compatible Router
The vast majority of modern home routers will work with VoIP without issue. But if you want the best possible call quality, it’s worth checking whether your router has QoS (Quality of Service) settings and enabling them.
QoS lets you assign higher priority to VoIP traffic versus regular internet activity like streaming or downloads, helping decrease the likelihood of choppy or dropped calls.
How To Set Up VoIP Phone System At Home: A Step-By-Step Process
With your equipment sorted, here is precisely how to install a VoIP system at home in the UK. Follow these five steps and you’ll be calling in no time.
Step 1: Choose A Reliable VoIP Service Provider
You need to select your VoIP provider before buying any hardware or configuring anything. This is the single most important decision in the entire process, as your provider dictates your call quality, features and monthly bill.
Be sure to take the following into consideration when evaluating a provider:
- Pricing Model: For home use, per-user monthly plans are typical. Home/personal equivalent plans typically cost £5 to £15 per user per month in the UK.
- UK Phone Numbers: Ensure your provider can deliver a UK geographical number (e.g. 020, 0161) or virtual number.
- Number Porting: If you want to keep your current home phone number, see if the provider allows for number porting.
- Features: Are voicemail, call forwarding, caller IDs, and call waiting included in the plan? Do you have add-ons for recording calls?
- Able to place emergency calls: Verify that your provider supports 999/112 calls. All UK providers need to offer this, though it’s worth checking.
- Contract Terms: If you’re just starting out, look for a provider that has flexible rolling monthly contracts.
Step 2: Acquire the Necessary Hardware
After you sign up and select your provider, they will share SIP (Session Initiation Protocol) credentials with you, usually a username, password, and SIP server address. These are used to register your device.
Depending on the type of device you selected, here’s what to do:
If using an IP phone:
- Take the phone out of the box and plug in the power cable (or use a PoE Power over Ethernet cable if your router supports it).
- Connect the phone to a LAN port on the router with an Ethernet cable.
- First, turn the phone on and let it initialise.
- Go into the phone’s settings menu (generally, this is done through the screen interface or a web browser by entering your phone’s IP address), and input your SIP (Session Initiation Protocol) credentials.
- If you entered correct credentials, your phone should now register with the provider’s server and show as ‘Ready’ or ‘Registered’.
If using an ATA adapter:
- Connect your regular phone to the ATA’s phone port.
- Link your ATA to your router with the Ethernet cable.
- Power the ATA on.
- Log in to the ATA web configuration panel (with a browser by using the device IP address) and add your SIP credentials.
- Save and reboot; your phone should have a dial tone now.
If using a softphone app:
- Install your preferred softphone (e.g., Zoiper, Linphone) on your computer or smartphone.
- Launch the application and navigate to Add Account (SIP Account).
- Enter your SIP username and password, as well as the server address assigned by your VoIP provider.
- Save settings: the app will try to register.
- Once there, you’re all set to make and receive calls.
Step 3: Verify Your Internet Connection
It’s also a smart move to check that your internet connection is doing well before making the calls. The most common reason for VoIP call quality issues is a poor or unstable connection.
Here’s what to check:
- Run a speed test at speedtest. For single-user VoIP, you want at least 10 Mbps download and 1 Mbps upload speed.
- Check your ping and jitter. Ping (under 50 ms) and jitter (under 20 ms) should be low for smooth and uninterrupted calls.
- When you can, plug your VoIP device directly into the router through an Ethernet cable. Wired connections are far more reliable than WiFi for real-time audio.
- If you must use WiFi, be near the router and on the 5GHz band rather than 2.4GHz to avoid interference; ideally, your device should support 5GHz.
- Sign into your router and configure QoS settings so VoIP traffic receives more priority than other internet activity in your home.
Step 4: Set Up Your VoIP Settings
Now that your device is registered and you’ve confirmed that it can connect to the internet, log in to your VoIP provider’s online portal and set your preferences. Providers vary, but most will include:
- Voicemail: Record a voicemail message of your choice, and choose when to let missed calls go to voicemail, or not.
- Call Forwarding: Establish rules for routing calls to a cell phone if you’re away from your desk or if the line is busy.
- Call Waiting: Turn this on to be notified if you’re already on a call and another one comes in.
- Caller ID: Define the number that people will see when you call them; this is your outbound caller ID.
- Do Not Disturb (DND): Set up quiet hours so calls don’t ring through during certain times of day.
- Number Porting: If you’re bringing an existing number, you’ll have to start the porting process. In the UK, the process generally takes 5 to 10 working days.
Step 5: Test Your Call Quality
Spend some time running some tests before relying on your new home VoIP setup for important calls.
- Make a Test Call: Call up a friend, family member, or colleague and ask them how the call sounds to their end.
- Listen For Issues: Watch out for any lag (delay in audio), echo and sudden drops. Some variation is expected, but persistent issues require resolution.
- Test Incoming Calls: Have someone call your new VoIP number and make sure it rings correctly and that voicemails are picked up if you don’t answer.
If you have issues, here’s a quick troubleshooting guide:
- Echo: Change from WiFi to a wired Ethernet connection.
- Choppy or robotic voice: Enable QoS in your router settings and test your broadband speed.
- Calls drop after a few minutes: This condition is usually a NAT/router timeout issue; check with your VoIP provider for router-specific settings.
- Phone not registering: Make sure your SIP username and password are correct, and that you’re not blocking SIP traffic on port 5060 from your router.
Common VoIP Setup Problems
No matter how well you set up your VoIP system, issues can occur from time to time. Here’s a look at the most common problems people experience when setting up a VoIP system at home, and what to do about them:
1. Choppy, Robotic or Distorted Audio (Poor Call quality)
This condition typically is a bandwidth or network problem. Switch to a wired Ethernet connection, enable QoS on your router, and shut down any bandwidth-hogging apps that may be running in the background (video streaming, large downloads, or cloud uploading).
2. Does Not Register With The Provider
Make sure that your SIP username, password, and server address are entered correctly, as even a single typo can prevent registration. Also ensure that your router’s firewall isn’t blocking SIP traffic (port 5060 UDP/TCP and RTP ports 10,000 to 20,000).
3. One-Way Audio
This is nearly always a NAT (Network Address Translation) configuration error on your router. Most modern routers should handle this automatically; however, if not, you can either enable ‘SIP ALG’ in your router settings or contact your VoIP provider for NAT traversal settings specific to your router model.
4. No Dial Tone After Setup
No dial tone on IP phone or ATA. If you notice no dial tone, first verify that the device is powered on and connected to the internet. Confirm that the device is enrolled in your provider portal. If the device is unregistered, re-enter the SIP credentials and then restart it.
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Just tell us how many users you have, which features are most important for your use case, and what budget you have available, and we’ll connect VoIP providers that meet your criteria.
FAQs
Yes. VoIP can work with any UK broadband connection, such as BT, Virgin Media, Sky, TalkTalk, Vodafone, etc. The only demand is that you have a stable connection with good speed and low latency. Fibre broadband is likely to deliver the best performance, although standard ADSL may still be suitable for occasional home use.
No. The key benefit of VoIP services is that there is no need for a traditional phone line. All you require is a functional broadband connection. Most people get VoIP to avoid the extra cost of renting a landline.
In most cases, yes. It is called number porting. It is well supported by the majority of UK VoIP providers, and they will port your existing geographic number to their network. The process usually takes 5 to 10 working days, and until the transfer completes, you can generally continue to use your old number.
