What is VoIP? A Simple Guide for Businesses in Liverpool and the North West

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Guide to VoIP: A Comprehensive 2025 Overview for Liverpool & UK Businesses

If you’ve ever used WhatsApp, Microsoft Teams, or Zoom to call a client or colleague, you’ve already experienced a cloud telephony system. Our updated Guide to VoIP explains why businesses across the UK—and especially in Liverpool—are migrating from old copper lines to modern digital voice solutions.

What Is VoIP?

VoIP (Voice over Internet Protocol) enables voice calls over IP networks instead of copper-based systems like PSTN or ISDN. It transforms your voice into digital data packets, sent over broadband or fibre, then decoded at the other end by a compatible VoIP system or adapter. Whether via a softphone app or a desk-mounted IP phone, it’s essentially an internet phone system.

How It Works

Pick up or dial using an IP device or softphone.
Your voice converts into digital packets.
Packets travel over the Internet.
The recipient’s device reassembles them into sound in real time.

The result: seamless calling that feels like traditional telephony, but with extra clarity and flexibility.

Why Transition? VoIP Migration Liverpool & Nationwide

UK PSTN Retires by January 2027… The Public Switched Telephone Network is being phased out by Openreach in stages across the UK, making VoIP migration in Liverpool and elsewhere essential.
Cost Savings of 30–50%+… UK businesses typically save 30–50% by switching to VoIP compared to old landline charges. London companies save even more on international calling.
Feature-Rich & Scalable… Modern platforms offer call routing, analytics, CRM integration, voicemail‑to‑email, recording, video conferencing, and more capabilities once reserved for expensive systems.
Flexible & Remote-Ready… Staff in Liverpool or working remotely can use their business number via the app or softphone. The IP‑based calling platform approach enables work-from-anywhere efficiency.

Security & Best Practices: UK VoIP Security Guide

Security is critical, and VoIP is vulnerable without proper setup. Ensure your provider uses TLS, SRTP encryption, strong passwords, multi-factor authentication, and zero default credentials. Also, beware of DDoS attacks, SIP ALG interference, and packet loss during poor internet connectivity. Liverpool businesses should assess providers for GDPR compliance and UK-hosted infrastructure to reduce risk.

Future Trends: 2025 Cloud VoIP Trends UK

AI-powered voice analytics and automated transcription are now mainstream.
5G & VoLTE extend high-quality VoIP to mobile data reliably.
Even small businesses now share advanced features previously limited to enterprises.

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Get Started: Migration Checklist for Liverpool Businesses

Step	Action
1	Audit the current phone system and internet bandwidth
2	Choose a secure provider with UK-based servers and GDPR compliance
3	Ensure porting of Liverpool geographic numbers (0151 area code)
4	Train staff, install apps, and test in advance
5	Arrange battery backup or mobile failure setup for outages

When must Liverpool businesses complete VoIP migration?

By January 31, 2027, the UK’s legacy PSTN and ISDN networks will be fully shut down. However, it’s important to note that Openreach has already started phasing out services in several regions—including parts of Liverpool and the North West—as early as 2023. Therefore, businesses in Liverpool should begin planning their VoIP migration now to avoid service disruptions. Acting early ensures a smoother transition and gives you time to assess providers, train staff, and test systems before deadlines.

Can I keep my 0151 number on VoIP?

Yes, you absolutely can. When you switch to a VoIP phone system, number porting allows you to retain your existing Liverpool (0151) landline number. This is crucial for maintaining your brand identity and ensuring customers can still reach you without confusion. The porting process is typically handled by your new VoIP provider, but it’s wise to check how long it takes—usually between 5 to 10 working days, depending on your current carrier.

How secure are VoIP calls for UK businesses?

VoIP can be highly secure—if configured correctly. Modern cloud telephony systems use protocols like TLS (Transport Layer Security) and SRTP (Secure Real-Time Transport Protocol) to encrypt calls. Additionally, choosing a UK-based VoIP provider ensures data protection compliance under GDPR. To further enhance your VoIP security, make sure to use strong passwords, enable multi-factor authentication, restrict admin access, and disable unused ports. Regular software updates and employee training are also essential to prevent threats like phishing or DDoS attacks.

Will VoIP still work if the internet goes down in my office?

While VoIP does rely on an internet connection, there are several failover options available to maintain service during an outage. First, many providers offer mobile app access, so calls can automatically reroute to smartphones if your office loses connectivity. Secondly, 4G or 5G backup routers provide instant failover, ensuring minimal disruption. Additionally, some VoIP handsets come with Power over Ethernet (PoE) and battery backup features, which are especially useful during short-term power outages. Therefore, with proper planning, downtime can be almost entirely avoided.

What average savings can a UK SME expect by switching to VoIP?

On average, UK SMEs save between 30% and 60% on telephony costs after switching to VoIP. These savings stem from lower call charges, especially for international or mobile numbers, no line rental fees, and minimal hardware maintenance. Moreover, many VoIP platforms offer inclusive bundles with advanced features—such as call recording and voicemail-to-email—at no extra cost. Over time, this creates a significant reduction in monthly operational expenses, making VoIP a smart choice for cost-conscious Liverpool businesses.

Do I need special VoIP phones or can I use existing devices?

You don’t necessarily need new hardware to get started with VoIP. In fact, many UK businesses—especially startups—use softphones, which are apps that allow calls through computers, tablets, or smartphones. However, for offices that prefer traditional desk phones, there are IP-compatible handsets that connect via Ethernet rather than a telephone socket. These often support HD audio, PoE, and programmable buttons. Additionally, some VoIP adapters can convert legacy phones into IP-ready devices, which may be ideal if you’re gradually migrating your system.

What emerging VoIP features are now standard in 2025?

As of 2025, VoIP systems offer a wide range of next-gen features as standard, even in basic plans. These include AI-powered call transcription, voice analytics, intelligent call routing, and seamless CRM integration. Furthermore, video conferencing, presence indicators, call whispering, and real-time dashboards are becoming essential tools for sales and support teams. These features help UK businesses work more efficiently, especially in hybrid and remote environments. Many platforms now also support integration with Microsoft Teams and Slack, streamlining unified communication.

How do I choose the right VoIP provider in the UK or Liverpool?

Choosing the right VoIP provider involves more than just comparing prices. First, ensure the provider is UK-based or offers UK-hosted data centres to guarantee GDPR compliance. Next, evaluate uptime guarantees, customer support responsiveness, and the flexibility of contracts. For Liverpool-based firms, it’s often beneficial to choose a provider that understands local infrastructure and porting requirements. Finally, ask for a demo or free trial, check online reviews, and verify whether the provider supports future growth through scalable plans and advanced features.