Zen Systems · 3CX Titanium Partner
What is a 3CX phone system?
One platform for your calls, queues, video meetings and mobile apps. Run by us with 18+ years of experience.
3CX is a business phone system software used by more than 12 million people daily, delivered by a Titanium Partner with 18+ years of experience. We provide an end-to-end fully managed system for your business, that means we stay with your system long after go-live.
We will look at what you have and tell you the truth, even if the answer is to change nothing.
3CX Titanium Partner
Top tier of 3CX's five-tier programme
18+ years
Working with 3CX
99.99% uptime SLA
Hosted in Equinix London private cloud
Excellent on Trustpilot
In our customers' own words, below
The answer
What is 3CX?
3CX is a software phone system, founded in 2005. It replaces the box on the wall with a platform that runs in the cloud, so your team can take calls on a desk phone, in a browser or on their mobile.
You license the phone system, not each person on it. It is a market leading pricing model compared to per-user platforms like RingCentral or 8x8.
350k+
Companies worldwide run on 3CX
12M+
People use it every day
2005
The year 3CX was founded
1 licence
Per system, not per seat
What your team gets day to day
- Redesigned Web Client
- iOS and Android apps
- Call queues
- CRM integrations
- Video conferencing
- AI summaries and transcription
Three editions
We will tell exactly what is best for you
Every edition uses the same per-system licensing. We regularly advise customers not to pay for features they will not use.
Entry level
Basic
The essentials of a modern phone system for smaller teams with straightforward calling needs.
- Web Client and mobile apps
- ✓
- Call queues
- ✗
- Reporting
- ✗
- CRM integrations
- ✗
- AI features
- ✗
For busy phone lines
PRO
For teams whose customers ring in and expect to be handled well.
- Web Client and mobile apps
- ✓
- Call queues
- ✓
- Reporting
- ✓
- CRM integrations
- ✓
- AI features
- ✗
PRO plus AI
AI Edition
Everything in PRO, plus AI that picks up, takes notes and follows through.
- Everything in PRO
- ✓
- AI Receptionist
- ✓
- AI Personal Assistant
- ✓
- AI Agents
- ✓
- Transcription and summaries
- ✓
The 3CX features our customers value most
What each one does for your business, and which edition you need for it.
| Feature | What it does for you | Edition |
|---|---|---|
| Redesigned Web Client | Make and take calls, see who is free and join meetings from any browser, with nothing to install. | All editions |
| iOS and Android apps | Your business number on your mobile, including queue management on the move. | All editions |
| Video meetings | Meetings live in the same system as your calls, so there is one less subscription to manage. | All editions |
| Advanced call queues | Share busy periods fairly across the team, with live visibility of agents and abandoned calls. | PRO and above |
| CRM integration | The caller’s record pops up as the phone rings, and every call is logged automatically. | PRO and above |
| AI Receptionist | Routes callers and answers common questions around the clock, taking pressure off your team. | AI Edition |
| AI transcription and summaries | A written record of every call, using the AI provider you choose. | AI Edition |
Why experience matters
Everyone sells the same 3CX. Not everyone has 18+ years of running it.
The software is identical wherever you buy it. What changes is who sets it up, who moves you across and who picks up when something needs attention. That is where our experience makes the difference.
18+ years with 3CX
We have installed, supported and troubleshot 3CX systems of every shape and size, so there is very little we have not already seen and solved.
3CX Titanium Partner
The top tier of 3CX’s partner programme, earned through certified engineers and a long track record with the product.
We plan around the problems others miss
Number ports, handset provisioning and call routing are where less experienced providers get caught out. We plan for them before they reach your customers.
A question worth asking any provider
How long have you been working with 3CX, and who will I actually speak to when I call?
Is 3CX any good?
You should not have to take our word for it
Here is what independent reviewers found.
39
G2 badges across 206 G2 Fall 2026 reports
#1
G2 Enterprise Implementation Index for Contact Center
350k+
Companies worldwide run on 3CX
12M+
People use it every day
The honest bit
If you search "3CX security", you will find 2023. Here is what changed.
3CX had a serious security incident in 2023. We would rather you heard it from us, with the specifics of how 3CX responded, than found it on your own and wondered why we did not mention it.
The EFTA Security Charter
Isolated, rebuilt build environment
The software is now built somewhere separate from everything else.
Ongoing Mandiant code review
Independent security specialists keep checking the code.
HackerOne bug bounty programme
Outside researchers are paid to find problems first.
The switch
The switch you are dreading is the thing we are best at
We know changing provider is the part that keeps you up at night. So we treat it as the moment that matters most.
You are worried: "What if we buy the wrong thing?"
We start with a health check, not a sales pitch
We look at what you have today and recommend what you need, including the features you should not pay for. One customer asked about headsets; we told them to buy a single one and test it first, from somewhere they could return it.
You are worried: "Our customers will not be able to reach us."
Your callers never notice the move
We plan the switch around your business, not ours. Where a number port takes time, we set up temporary numbers so calls keep coming in.
You are worried: "I will look foolish if this goes wrong."
We are on the line on go-live day
The same engineers who planned your switch are there when it happens. You will not be raising a ticket and waiting.
Calm, in control, looked after
A recent customer told us that anything changing is a big, scary thing in their business, and that we made the transition easy.
After go-live
We are still here. And we already know your system.
Other providers treat go-live as the finish line. For us it is where the relationship starts.
We call you, without a bill attached
Proactive check-in calls surface the small things that would never become a support ticket, and fix them before they grow.
Engineers who know your setup
When you ring, you speak to someone who already knows how your system is built. No starting from scratch with a stranger.
Answered within three rings
Call support on 0333 344 0239 and a person picks up within three rings, 9am to 5:30pm, Monday to Friday.
Even when it costs us the sale
- When an alarming software warning appeared, we told a customer it was nothing to worry about, rather than selling them a fix.
- We regularly advise customers not to pay for features they will not use.
In their own words
“Compared to anyone else I have previously used they are like a breath of fresh air! James, Dean and the team have been great getting this excellent, feature-rich system up and running.”
J Julian, Oxfordshire. 30+ years in business
“We had problems with BT and were recommended to Zen Systems for our digital phone upgrade. James and his team helped us implement 3CX and it is very user-friendly. Their support is very helpful and resolves any issues quickly.”
B Brooks, Mayfield Accountants
“James Howard-Dobson and his team were extremely helpful in migrating us from our previous provider, responding with grace to challenges encountered along the way. Our service is now running very smoothly.”
Dan Milgram, Owner at Transpharmation Ltd
Two ways to run 3CX
Hand it all to us, or run it yourself
Either way, you get a Titanium Partner who knows the product. If you are unsure which suits you, that is exactly what the health check is for.
Fully Managed 3CX
We look after the design, setup, hosting and support, so you can focus on running your business.
- 3CX licensing included
- Hosting in Equinix London private cloud
- Free UK landline and mobile minutes
- Unlimited support
3CX Licence Only
Buy the licence and host it yourself, with help from our 3CX-certified engineers whenever you want it.
- Instant key delivery from a Titanium Partner
- Choose your own SIP trunk
- Certified engineers on hand when you need them
Peace of mind in business telecoms
Find out where you stand. No pitch, no pressure.
In a free telecoms health check we look at your current system, contract and costs, then tell you honestly whether 3CX is right for you. If the best answer is to stay where you are, we will say so.
Prefer to talk now? Call sales on 0115 822 1270