PSTN & ISDN switch-off: January 2027. Traditional phone lines are being permanently switched off. If your business hasn’t moved to VoIP yet, the clock is ticking. Find out what you need to do →
VoIP & Business Telephony

Modern phone systems. Traditional lines are ending.

The UK’s PSTN and ISDN network switches off in January 2027: every business needs to move to VoIP. WikiTech supplies and manages cloud phone systems for businesses across Kent and beyond, from £7.90 per user per month, tailored to your size and setup.

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Jan 2027 PSTN & ISDN switch-off deadline
£7.90 VoiceFlex Flow Essentials, per user/month
3 platforms Teams Voice · 3CX · VoiceFlex Flow
Numbers kept we port your existing numbers
The switch-off

Traditional phone lines are being switched off. Permanently.

The UK’s Public Switched Telephone Network (PSTN), the copper-wire infrastructure that has carried phone calls since the Victorian era, is reaching the end of its life. Openreach will switch it off completely in January 2027. That includes ISDN lines, analogue phone systems, and FTTC broadband connections that rely on the copper network.

Jan 2027
Full switch-off deadline

After this date, PSTN and ISDN lines will stop working entirely. Businesses that haven’t migrated will lose their phone service with no fallback.

Some providers are already stopping new orders on ISDN and traditional lines. The migration needs to happen now, not in December 2026.

Source: Openreach / BT / GOV.UK

What’s being switched off?

All PSTN lines, ISDN2, ISDN30, analogue phone lines, and any broadband or phone service running over copper infrastructure.

Who does this affect?

Every business in the UK that uses a traditional phone line, including businesses on hosted VoIP that still use ISDN trunks to connect to the network. It also affects lift phones, alarms, and card payment terminals connected via analogue lines.

What do you need to do?

Migrate to a cloud-based VoIP phone system using SIP trunks or a hosted PBX. All calls are routed over your internet connection, no copper required. WikiTech handles the full migration.

Why act now?

Migrating a phone system takes time: number porting, system setup, user training. Leaving it late risks disruption. Businesses that move now also typically save money immediately on line rental and call costs.

Platforms

Three platforms. One team to manage them all.

We don’t push one system onto every client. We work with three leading cloud telephony platforms and recommend the right one based on your size, existing setup, and how your team works.

Microsoft Teams Voice

Microsoft 365 · Quoted on request

If your business already runs on Microsoft 365, Teams Voice adds external calling directly inside the Teams app, with no separate phone system or additional apps required. Everything lives in your existing 365 environment: calls, chat, meetings, and files in one place.

  • Call external numbers from within Microsoft Teams
  • One app for calls, chat, meetings, and files
  • Works on desktop, mobile, and browser
  • No additional hardware needed
  • Microsoft Partner supply of licences
  • Presence sync across Teams and phone

3CX

Hosted PBX · Quoted on request

3CX is a full-featured hosted business phone system, ideal for businesses that need more than basic calling. Auto-attendants, call queues, ring groups, call recording, web conferencing, and a mobile softphone app are all included as standard.

  • Auto-attendant (IVR) and ring groups
  • Call queues and recording
  • Web conferencing included
  • iOS and Android softphone app
  • CRM integration (Salesforce, HubSpot, etc.)
  • Advanced certified engineers
  • Cost-effective for larger teams

VoiceFlex Flow

Hosted UCaaS · From £7.90/user/month

VoiceFlex Flow is a sophisticated cloud UCaaS platform supplied through our VoiceFlex reseller partnership. It combines hosted telephony with advanced call management, Teams integration, and deep CRM connectivity, in hours, not weeks.

  • Full hosted PBX with ACD and IVR
  • Native Microsoft Teams integration
  • Skills-based call routing
  • CRM integration (Dynamics, Salesforce, HubSpot, Zendesk)
  • DIY admin portal, no engineer needed for changes
  • Fixed mobile convergence: one number, any device
What’s included

Everything a modern business phone system should do.

All platforms we supply include the core features your business needs, and because everything runs in the cloud, adding users or changing your setup takes minutes, not days.

Softphone, no hardware needed

Make and receive calls from a desktop app, browser, or mobile phone. Your business number follows you wherever you are, with no desk phone required to get started.

Hunt groups & ring groups

Route incoming calls to the right team or individual. Set up ring-all, sequential, or skills-based routing so calls are always answered by the right person.

Auto-attendant (IVR)

“Press 1 for sales, press 2 for support.” Professional call menus that direct callers without needing a receptionist, available around the clock and configurable in minutes.

Call recording

Record calls for training, compliance, or dispute resolution. Recordings are stored securely in the cloud and accessible on demand.

Number porting

Keep your existing phone numbers. We manage the full porting process so your clients and contacts can always reach you on the same numbers they already have.

Remote & hybrid working

Open the app on your phone or laptop and you’re in the office: same number, same extension, same features. No VPN, no forwarding, no missed calls.

Call reporting & analytics

See call volumes, wait times, missed calls, and team performance. Identify where calls are being lost and make informed decisions about staffing.

CRM integration

Connect your phone system to Salesforce, HubSpot, Microsoft Dynamics, and more. See caller information before you pick up and log calls automatically.

Pricing

Simple per-user pricing, no hidden costs.

VoiceFlex Flow is priced per user per month on a 12-month term, with calls included. Pick the tier that fits your team, and add features as you grow. Microsoft Teams Voice and 3CX are quoted on request.

Great value

VoiceFlex Flow Essentials

A full hosted cloud phone system, no hardware needed.

£7.90/user/month

12-month term. UK national & mobile calls included. Licences are flexible, not tied to phone numbers or desks.

  • Hosted cloud PBX, no on-site hardware
  • Softphone & mobile app (iOS & Android)
  • Hunt groups, IVR, voicemail
  • 2,000 min/month UK national & mobile calls
  • SIP phone support for desk phones
  • Number porting managed by WikiTech
Get started
Most features

VoiceFlex Flow Business

Full UCaaS with call recording & Teams integration.

£12.50/user/month

12-month term. Everything in Essentials, plus call recording, Microsoft Teams integration, and collaboration tools built in.

  • Everything in Flow Essentials
  • Call recording with 2-year storage
  • Native Microsoft Teams integration
  • Chat, video & screen sharing
  • Fixed mobile convergence: one number, any device
  • CRM integrations (Dynamics, Salesforce, HubSpot)
Get started

Microsoft Teams Voice

Telephony inside your Microsoft 365 ecosystem.

Quoted

Pricing depends on your existing Microsoft 365 licences and the Teams Phone add-on required. We supply everything as a Microsoft Partner.

  • External calls directly inside Microsoft Teams
  • Calls, chat, meetings & files in one app
  • Presence sync across Teams and phone
  • No additional apps or hardware required
  • Microsoft Teams Phone licence supplied
  • Managed by WikiTech as Microsoft Partner
Get a quote

All prices exclude VAT.

Add-on

PCI DSS compliant call recording

Required for businesses that take card payments over the phone. Automatically pauses recording during card number entry to ensure PCI DSS compliance.

£10per DDI / month
£6per additional channel
Discount available

Schools & charity pricing

We offer discounted VoiceFlex Flow pricing for schools, academies, and registered charities. Contact us to discuss eligibility and get a tailored quote for your organisation.

Ask about discount pricing
Number porting: we handle everything, a one-off fee applies. Single line port: £15. Multi-line port: £100. We manage the entire process end-to-end so there’s no disruption to your existing service.
Our commitment to you

12-month rolling contracts. You stay in control.

Traditional phone providers are notorious for locking businesses into lengthy contracts, sometimes as long as 8 years. We think that’s wrong. Our telephony runs on a simple 12-month rolling contract, and every contract includes a 60-day exit clause. If you’re not happy, you’re free to leave. We’re that confident in our service.

Because everything runs in the cloud, your phone system belongs to your business, not to us. Your numbers, your configuration, your system: it all comes with you if you ever move on. We deploy, we support, and we make ourselves worth staying with, not impossible to leave.

12-month rolling contract

No lengthy lock-ins. Just a fair, annual term that renews when you’re happy to renew it.

60-day exit clause, always

Every contract includes a 60-day exit clause. If we’re not delivering, you’re not trapped. We include this because we’re confident you won’t need it.

Your system. Your numbers.

Cloud-hosted means everything is portable. Numbers, settings, and configuration don’t live on our infrastructure, they belong to your business.

Hardware

Desk phones, for those who want them.

All our platforms include softphone apps, so a physical desk phone isn’t a requirement. But for staff who prefer a traditional handset, we supply and configure Yealink phones, one of the most widely used business phone brands in the UK.

Budget

Yealink SIP-T31

Reliable dual-line entry-level desk phone. Clear display, full HD audio, and PoE support. Ideal for general staff who make and receive straightforward calls.

Get a price
Mid-range

Yealink SIP-T44U

Well-rounded office phone with a colour display, USB ports for headset connectivity, and up to 12 SIP accounts. A strong choice for office workers who use the phone regularly.

Get a price
Executive

Yealink SIP-T88

Premium smart phone for senior staff and executives. Large touchscreen display, Android-based with app support, built-in Bluetooth and WiFi. Everything in one device.

Get a price

All phones are pre-configured before delivery: plug in and it works. Pricing on request based on quantity.

Real result

How we cut a client’s phone bill in half, and gave them their office back.

VoIP migration · Cost saving

Kent professional services firm: from £600/month on ISDN to under £200/month on VoIP

A 20-person professional services business in Kent had been on the same ISDN phone system for over a decade. The system worked, but it was expensive, inflexible, and tied entirely to the office. During and after the pandemic, staff working from home had to divert calls to personal mobiles, giving out personal numbers and missing calls when signal was poor.

Their monthly phone bill had crept up to over £600/month: line rental, call charges, and maintenance on ageing on-premise hardware. When their provider informed them the ISDN lines would be discontinued, they approached WikiTech to manage the migration.

We migrated them to a cloud-hosted VoIP system with SIP trunks, number porting for all existing numbers, and a softphone app for every staff member. The entire migration ran seamlessly out of hours, so they kept every phone number and their team started the next working day on the new system.

Their monthly bill dropped to under £200. Every team member can now open an app on their mobile or laptop and work exactly as if they were in the office: same number, same extension, same features. No forwarding. No missed calls. No personal numbers given out.

>65%reduction in monthly phone costs
£400+saved every month
Seamlessout-of-hours cutover, no lost working day
20staff working from anywhere, same number
Credentials

Backed by the right partnerships.

We supply and support VoIP through verified partnerships, not as a bolt-on, but as a managed service backed by proper accreditations.

Microsoft Partner

Microsoft licencing and Teams Voice supplied directly as a Microsoft Partner reseller.

VoiceFlex Reseller

Authorised VoiceFlex reseller for SIP trunks, Teams Direct Routing, and VoiceFlex Flow hosted systems.

3CX Advanced Certified

Our engineers hold 3CX Advanced Certification: design, deploy, and support complex 3CX environments.

FAQ

Common questions.

Will my existing phone numbers be kept?
Yes. We manage the number porting process end-to-end. Your existing numbers, whether geographic (01/02), freephone (0800), or non-geographic (03/08), can be ported to your new VoIP system. The porting process typically takes 2 to 4 weeks, during which calls continue to be received on your existing system. There is no gap in service.
Do we need new hardware to switch to VoIP?
No. All the platforms we supply include softphone apps for desktop (Windows and Mac), browser, iOS, and Android. Your staff can make and receive calls on their existing computers and mobile phones from day one. Physical desk phones are optional: we supply Yealink handsets for staff who prefer them, but they’re not a requirement.
What internet connection do we need?
VoIP calls use very little bandwidth, typically around 100kbps per simultaneous call. Most business broadband connections are more than sufficient. We’ll assess your connection as part of the setup process. For businesses with slower connections or reliability concerns, we can advise on whether a broadband upgrade makes sense alongside the VoIP migration.
Which platform is right for us: Teams Voice, 3CX, or VoiceFlex Flow?
It depends on how your business works. If you’re already using Microsoft 365 and Teams heavily, Teams Voice is usually the simplest option: calls happen inside the app you’re already using every day. If you need a full-featured phone system with call queues, IVR, and reporting, 3CX or VoiceFlex Flow are better fits. We’ll recommend the right platform based on your setup, team size, and requirements, not based on margin.
What happens to our phones during the migration?
We plan all migrations to run seamlessly out of hours. Typically, we set up the new system in parallel with your existing one, port numbers at a scheduled time (usually overnight or over a weekend), and verify everything is working before the old system is decommissioned. For most businesses, the switchover is seamless.
Is VoIP reliable? What if our internet goes down?
Modern cloud VoIP systems are highly reliable, with uptime typically 99.99%+ at the platform level. The main risk is your internet connection. We mitigate this in a few ways: mobile softphone apps mean staff can switch to 4G/5G data automatically, calls can be diverted to mobile numbers if internet is lost, and for businesses where uptime is critical, we can discuss backup connectivity options. In practice, internet outages are rare and brief for most businesses.
Does this need to be managed by WikiTech’s IT support team?
VoIP is supplied as a managed service alongside our IT support. Because your phone system is part of your IT infrastructure, connected to your network, integrated with Microsoft 365, and accessed from the same devices, it makes sense for it to be managed by the same team. We handle setup, configuration changes, number porting, user additions, and any faults. You don’t need to involve a separate telecoms provider.
Keep exploring
Managed IT support → Mobile phones & SIMs → Cloud services & Azure → Cyber security → Support pricing →

Don’t wait until 2027. Move to VoIP now and save money today.

Most businesses that switch to VoIP reduce their monthly phone costs significantly, and get a better, more flexible system in the process. A 15-minute assessment costs nothing.

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