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3CX Hosted Phone Systems
Turnkey cloud telephony for the UK PSTN switch-off. We handle everything — audit, porting, configuration, training, and support.
3CX Hosted Phone System — Your Complete PSTN Replacement
The UK's copper telephone network is being retired. Traditional analogue and ISDN phone lines are being switched off, and businesses that still rely on legacy phone systems need to act now. KTS provides a complete, turnkey 3CX hosted phone system that replaces your existing telephony infrastructure with a modern, cloud-based platform — without the complexity.
3CX is a software-based PBX that delivers enterprise-grade telephony without the hardware headaches. It runs entirely in the cloud on infrastructure we manage, giving your business crystal-clear voice calls, video conferencing, live chat, and mobile apps — all from a single platform. Whether you have 5 users or 500, the system scales to match your needs.
Our approach is fully managed and end-to-end. We start with a detailed audit of your existing phone lines, extensions, and call flows. We then design the new system, handle number porting, configure every detail of the 3CX platform, provision handsets or softphones, train your team, and provide ongoing support. You do not need to lift a finger — we take ownership of the entire process from day one.
The PSTN Switch-Off: Why You Need to Act Now
The UK's Public Switched Telephone Network and ISDN services are being permanently retired. Every business using traditional phone lines will need to migrate to an IP-based solution. Delaying the transition risks service disruption, lost calls, and higher last-minute migration costs. Our hosted 3CX solution future-proofs your communications and positions your business for modern, flexible working.
Legacy Lines Retiring
All analogue and ISDN lines are being switched off across the UK. Businesses on legacy systems will lose their phone service entirely.
Seamless Number Porting
We port all your existing phone numbers to the 3CX platform. Your clients and partners will not notice any change — just better call quality.
Future-Proof Platform
3CX is cloud-native, continuously updated, and built for the future. No more end-of-life hardware or expensive maintenance contracts.
Key Features of Our 3CX Hosted Phone System
Call Routing & IVR
Intelligent call routing, auto-attendant, ring groups, and call queues to ensure every call reaches the right person.
Voicemail to Email
Voicemail messages delivered directly to your inbox as audio attachments so you never miss a message.
Mobile & Desktop Apps
Native iOS, Android, and desktop apps let your team make business calls from anywhere using your company number.
Video Conferencing
Built-in video conferencing with screen sharing — no separate subscription or third-party tool required.
Live Chat Integration
Connect website live chat directly to your phone system so visitors can chat or call in one click.
Call Recording
Automatic or on-demand call recording for training, compliance, and dispute resolution.
CRM Integration
Integrate with popular CRMs to log calls automatically, pop customer records, and streamline workflows.
Hot Desking Support
Staff can log into any desk phone and have their personal profile, extension, and settings follow them.
Traditional PBX vs 3CX Hosted
See how a modern hosted 3CX system compares to a traditional on-premises PBX.
| Feature | Traditional PBX | 3CX Hosted (KTS) |
|---|---|---|
| Upfront Hardware Cost | High — server, cards, handsets | Low — handsets only (or softphones) |
| Ongoing Maintenance | Expensive annual contracts | Included in managed service |
| Scalability | Add lines = add hardware | Add users in minutes, no hardware |
| Remote Working | Limited or VPN-dependent | Full mobile & desktop apps built in |
| Video Conferencing | Separate system required | Integrated — no extra cost |
| Business Continuity | Single point of failure | Cloud-hosted with automatic failover |
| Feature Updates | Manual, often costly upgrades | Automatic — always on latest version |
| CRM Integration | Complex and expensive | Native integrations included |
Why Businesses Choose KTS for 3CX
- Reduced costs — no on-premises hardware to purchase, maintain, or replace
- Work from anywhere — full mobile and desktop apps with your business number
- Business continuity — cloud-hosted with failover so you never miss a call
- Scalable — add or remove users in minutes without hardware changes
- Unified communications — voice, video, chat, and SMS in one platform
- Fully managed — we handle configuration, updates, monitoring, and support
- PSTN-ready — complete migration service including number porting and training
Frequently Asked Questions
What is the PSTN switch-off and how does it affect my business? +
The UK's Public Switched Telephone Network (PSTN) and ISDN lines are being retired by the end of 2025. This means traditional analogue and digital phone lines will stop working. If your business still relies on a legacy phone system, you need to migrate to a VoIP-based solution like 3CX before the switch-off to avoid losing your phone service.
Will I keep my existing phone numbers? +
Yes. We handle the full number porting process for you, transferring your existing business phone numbers to the new 3CX platform. There is no downtime during the porting process and your callers will not notice any change.
Can my team use 3CX on their mobile phones? +
Absolutely. 3CX includes native iOS and Android apps that let your team make and receive business calls on their mobiles using your company number. This is ideal for remote workers, field staff, and anyone who needs to stay connected on the go.
How long does it take to set up a hosted 3CX system? +
A typical deployment takes between 2 and 4 weeks, depending on the complexity of your requirements and whether number porting is involved. We handle everything — from initial audit through to handset provisioning and staff training — so there is minimal disruption to your business.
What happens if our internet connection goes down? +
3CX includes built-in failover options. Calls can be automatically forwarded to mobile phones or alternative numbers if your primary internet connection drops. We also recommend implementing a backup internet connection for critical telephony environments.
Related Services
Managed Network Solutions
Enterprise-grade Ubiquiti networking to support your hosted telephony infrastructure.
Communication & Collaboration
Unified communication tools and platforms to keep your team connected.
Proactive IT Support
24/7 monitoring and management to keep all your systems — including telephony — running.
Ready to upgrade your phone system before the PSTN switch-off?
Get a free audit of your current phone setup and a no-obligation quote for a fully managed 3CX hosted system.