Switching to a VoIP phone system is a smart choice for businesses and people who want to save money and improve their communication. But there’s one common concern: Do you need to buy a special VoIP phone, or can you use your existing landline or mobile?
Many people assume VoIP requires expensive hardware, which can lead to some unnecessary purchases. Others attempt to use outdated phones, only to face poor call quality, connection issues, or a lack of essential features. The truth is that not all VoIP setups require a special phone - but choosing the correct device ensures a better experience. In this guide, we’ll explore how VoIP works, the different devices you can use, and whether investing in a dedicated VoIP phone is the right choice for you.
Highlights
- UK landlines will be phased out by 2025, making VoIP the future of business and home communication.
- Existing landlines can work with VoIP using an adapter. However, dedicated VoIP phones offer better quality and advanced features.
- More UK businesses are adopting VoIP. Flexible mobile apps and cloud systems make remote work easier and more efficient.
As the 2025 PSTN switch-off nears, is your business ready for the VoIP transition?
How Does VoIP Work?
VoIP (Voice over Internet Protocol) converts voice signals into digital data. This allows calls to be made over the internet instead of traditional phone lines, effectively removing businesses' dependence on landlines. Put simply, VoIP offers a cost-effective and future-proof communication solution.
To use VoIP, you need...
A Strong Internet Connection
At least 1 Mbps per call, but ideally 5 Mbps+ for offices with multiple users.
A VoIP Provider
This enables your calls to be routed securely over the internet.
A Compatible Device
This could be a VoIP phone, a traditional phone with an adapter, or a softphone app on your computer or mobile.
Did you know?
The UK’s PSTN switch-off means all traditional landlines will be phased out by December 2025. Once they are, VoIP will become the standard for business and home communications.
Can You Use a Standard Landline for VoIP?
Yes! If you prefer to keep your existing landline phone, you can use it for VoIP - but you’ll need an Analogue Telephone Adapter (ATA). This small device converts analogue signals into digital data, allowing a traditional phone to function as a VoIP device.
Pros of Using an ATA with a Landline
- Lower costs – No need to buy new phones immediately.
- Familiarity – Ideal for businesses wanting to keep the same hardware.
- Simple setup – Just plug the ATA into your router and start calling.
Cons of Using an ATA with a Landline
- Limited VoIP features – No built-in call forwarding, auto-attendants, or voicemail-to-email.
- Variable call quality – Older landline handsets may not support HD voice clarity.
- Less future-proof – ATAs may not support advanced VoIP functions in the long run.
Did you know?
Some UK VoIP providers, like ourselves, BT Cloud Voice and Vonage, offer ATA integration with their VoIP plans. This makes it easier for businesses to transition. If you are still considering, read our related article on Are All Routers Compatible with VoIP?
What Devices Work Best for VoIP?
One of the most significant advantages of VoIP telephone systems is their flexibility in device compatibility. Unlike traditional landlines that require dedicated hardware, VoIP can function across multiple platforms. This makes it a scalable solution for businesses of all sizes and individuals working remotely. For a top VoIP desk phone, a budget softphone app, or a way to add VoIP to your landline, the right device can boost call quality, reliability, and efficiency. Learning about the best VoIP-compatible devices can help you decide what works for you and your budget.
VoIP-Specific Phones (Best for Businesses)
VoIP desk phones are designed to connect directly to the internet and offer...
- HD voice clarity & noise reduction for crisp audio.
- Advanced call features like conferencing, call recording, and auto-attendants.
- Scalability, making them ideal for growing businesses.
Softphones & Mobile Apps (Best for Remote Workers)
Softphones are VoIP applications that allow calls via a laptop, tablet, or smartphone, and popular VoIP apps include...
- Microsoft Teams – Perfect for office collaboration.
- Zoom Phone – Integrated video and call solutions.
- 3CX – A cost-effective VoIP service for small businesses.
If your team works remotely or often travels, mobile VoIP apps let you call from anywhere. As we discuss in our blog on Can I Plug in My VoIP Phone Anywhere? just make sure you have a stable internet connection!
Should You Invest in a Dedicated VoIP Phone?
While many people assume VoIP requires expensive hardware, the reality is that you can use VoIP without a dedicated phone. If a business gets a lot of calls or if someone wants a more professional communication setup, a dedicated VoIP phone can provide many benefits. These devices are great for internet calling as they provide clear sound and reliable service. You can also use features like call forwarding, auto-attendants, and conference bridging. But is a VoIP phone necessary for everyone? That depends on your usage, business requirements, and long-term communication strategy.
Who Benefits the Most?
Businesses Handling High Call Volumes
If reliability is key, VoIP phones provide superior call clarity.
Customer Service & Sales Teams
Call management features such as auto-attendants, call queuing, and voicemail-to-email improve efficiency.
Companies Transitioning From Traditional Landlines
With the UK PSTN switch-off in 2025, VoIP is the future.
Cost Comparison: VoIP Phones vs. Adapted Landlines
Standard Phone + ATA
- Initial Cost - Lower (£30-£80)
- Call Quality - Dependent on internet & adapter
- Advanced Features - Limited
- Setup Complexity - Simple
VoIP Phone
- Initial Cost - Higher (£50-£300)
- Call Quality - Optimised for VoIP
- Advanced Features - Full VoIP functionality
- Setup Complexity - Plug & play
Future-Proof Your Communication with VoIP
With the UK’s Public Switched Telephone Network (PSTN) due to shut down by 2025, VoIP is no longer an alternative. It is now the new standard, and switching sooner rather than later can help businesses and individuals save money. VoIP offers more flexibility and access to advanced call features, and users will stay connected as the PSTN phase-out occurs.
Key Takeaways
- You don’t need a special phone for VoIP, but the proper hardware improves reliability.
- ATAs allow landline use, but VoIP-specific devices provide the best experience.
- Remote workers benefit from VoIP apps, ensuring calls can be made anywhere.
The question is not whether you should switch to VoIP but how to transition smoothly. Pick the right VoIP provider, set up your devices well, and build a strong internet infrastructure. Do this, and you will keep your business communication future-proof, scalable, and efficient for years. So don’t wait—the 2025 PSTN switch-off is approaching quickly.
Book a free consultation or call 01202 514444 to explore your VoIP options today.
