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Business Phone Systems — UK & Ireland
Business Phone Systems UK & Ireland | VoIP & On-Premise Solutions
Yellowcom provides reliable, cost-effective business phone systems across the UK & Ireland. Whether you need a cloud-based VoIP phone system, an on-premise PBX, or a flexible hybrid solution, our experts will help you reduce costs, improve productivity, and keep your teams connected.
- 4.9★ · 650+ Trustpilot Reviews
- 18+ Years' Experience
- iPECS Best Global Partner Award
- Local UK & Ireland Engineers
Last reviewed: March 2026
Book Your Free Phone System Review!
Free callback from our telecoms specialist to review your new or existing requirements
Choose Your System
Which Business Phone System Is Right for You?
From fully hosted cloud VoIP to on-premise PBX — Yellowcom designs, installs, and supports every type of business phone system across the UK and Ireland. Whether you need office business phone systems for a fixed workplace or hosted business phone systems for a distributed team, our advisors will match you to the right solution at no cost.
☁️
Cloud / VoIP Phone System
Best for: SMEs, hybrid teams & growing businesses
- No on-site hardware required
- Mobile app — work from anywhere
- Auto-attendant & call routing
- Add users in minutes as you grow
From £9.98/user/month
Explore cloud phone systems →🏢
On-Premise PBX System
Best for: Established businesses, fixed sites
- Full on-site control & ownership
- iPECS by Ericsson-LG hardware
- SIP trunking for lower call costs
- Installed by local engineers
Get a quote — tailored to your site
Explore on-premise PBX →🔀
Hybrid Phone System
Best for: Multi-site businesses & phased upgrades
- Keep existing hardware investment
- Add cloud features gradually
- Ideal for 2027 PSTN migration
- Flexible per-site configuration
Get a quote — flexible to your setup
Explore hybrid systems →💬
Microsoft Teams Phone
Best for: Microsoft 365 users
- External calls inside Teams
- One app for calls, chat & meetings
- Direct Routing or Operator Connect
- No extra handsets needed
From £8/user/month add-on
Explore Teams Phone →Cloud / VoIP Phone System
Best for: SMEs, hybrid teams & growing businesses
- No on-site hardware required
- Mobile app - work from anywhere
- Auto-attendant & call routing
- Add users in minutes as you grow
From £10/user/month
Explore cloud phone systems →
On-Premise PBX System
Best for: Established businesses, fixed sites
- Full on-site control & ownership
- iPECS by Ericsson-LG hardware
- SIP trunking for lower call costs
- Installed by local engineers
Get a Quote
Explore on-premise PBX →
Hybrid Phone System
Best for: Multi-site businesses & phased upgrades
- Keep existing hardware investment
- Add cloud features gradually
- Ideal for 2027 PSTN migration
- Flexible per-site configuration
Get a Quote
Explore hybrid systems →
Microsoft Teams Phone
Best for: Microsoft 365 users
- External calls inside Teams
- One app for calls, chat & meetings
- Direct Routing or Operator Connect
- No extra handsets needed
From £6/user/month
Explore Teams Phone →
Small Business
Business Phone Systems for Small Businesses
Whether you're a two-person start-up or a 50-seat office, Yellowcom's small business phone systems are affordable, easy to manage, and built to scale, with no IT department required.
- Fully managed setup, number porting & staff training included
- Add users or features in minutes as your business grows
- Local engineers, not an overseas call centre
- From £10 per user per month, all-inclusive
3,000+
SME customers across
UK & Ireland
⚠️
Action Required — 2027 Deadline
PSTN & ISDN Lines Are Being Switched Off in 2027
Every UK business using traditional analogue or ISDN lines must migrate to VoIP or a cloud phone system before Openreach's January 2027 deadline. Yellowcom makes the transition seamless — we assess your setup, manage the migration, and keep your business online throughout.
What's Included
Everything Your Business Needs, Built In
Every Yellowcom phone system includes these features as standard, no hidden add-ons, no surprise costs.
Mobile App & Softphone
Make and receive calls on your business number from any smartphone or laptop. Your team stays reachable wherever they're working - office, home, or on the road.
Auto-Attendant & Call Routing
Greet callers professionally and route them to the right person automatically. Reduce missed calls and give every caller a consistent, branded experience from day one.
Call Recording
Record inbound and outbound calls automatically for compliance, training, and dispute resolution. Securely stored and accessible via your admin portal at any time.
CRM Integration
Connect to Salesforce, HubSpot, Zoho, or Microsoft Dynamics. Calls log automatically, customer records pop on incoming calls, your team saves hours every week.
Call Analytics & Reporting
Connect to Salesforce, HubSpot, Zoho, or Microsoft Dynamics. Calls log automatically, customer records pop on incoming calls, your team saves hours every week.
Number Porting - Keep Your Number
Switching systems doesn't mean changing your number. Yellowcom manages the porting process end-to-end so your existing numbers carry across without any interruption.
Compare Systems
Cloud vs On-Premise vs Hybrid - Full Comparison
Not sure which type of business phone system is right for you? Here's how the main options compare across cost, flexibility, and suitability.
| Feature | ☁️ Cloud / VoIP | 🏢 On-Premise PBX | 🔀 Hybrid | 💬 MS Teams Phone |
|---|---|---|---|---|
| Upfront Cost | Low — minimal hardware | Higher — hardware investment | Medium — mixed | Low — software only |
| Monthly Cost | Per user — predictable OpEx | Fixed — lower ongoing fees | Mixed CapEx / OpEx | Per user add-on |
| Internet Required | Yes — broadband needed | No — works independently | Partial | Yes — MS365 required |
| Remote & Hybrid Work | ✓ Excellent — full mobile app | ⚠ Limited without add-ons | ✓ Good | ✓ Excellent |
| Scalability | ✓ Add users instantly | ⚠ Hardware may limit growth | ✓ Good | ✓ Add licences easily |
| PSTN 2027 Compliant | ✓ Fully compliant | ⚠ SIP trunking upgrade needed | ✓ With cloud layer | ✓ Fully compliant |
| Best Suited For | SMEs, remote & hybrid teams | Fixed single-site businesses | Multi-site, phased upgrade | Microsoft 365 users |
👋 Not sure which system suits you? Our consultants assess your needs and recommend the right fit — at no cost.
Get a Free Consultation →Customer Reviews
What Our Customers Say
4.9
650+ Trustpilot Reviews
“Yellowcom migrated our entire office to cloud VoIP without a single hour of downtime. They explained everything in plain English — no jargon, just results.”
Sarah M.
Office Manager, Glasgow Law Firm
“We were still on ISDN with no idea what to do before the switch-off. Yellowcom sorted everything — new system, ported our numbers, trained the staff. Couldn’t recommend them more.”
Damien F.
Director, Belfast Construction Company
“The mobile app is a game changer. Our team works across three sites and everyone’s on the same system. Call quality is excellent and support always answers first time.”
Rachel T.
Operations Director, Dublin Hotel Group
3,000+
SME customers across UK & Ireland
18+
Years of business telecoms experience
4.9★
Trustpilot from 650+ reviews
3
Offices — Belfast, Glasgow & Dublin
Why Yellowcom
Big Enough to Support. Small Enough to Care.
We’re not a faceless telecoms giant. We’re a UK & Ireland business with local engineers, dedicated account managers, and a genuine commitment to getting it right for every customer, every time.
🏆 iPECS Best Global Partner Award
🤝 Gamma Platinum Partner
🔵 Microsoft Partner
📞 Ericsson-LG Authorised Reseller
⚡ Local UK & Ireland Engineers
🚫 No Offshore Call Centres
Industries We Serve
Phone Systems Tailored to Your Industry
Every sector has different communication challenges. We know them and we build phone systems around them.
Hotels & Hospitality
Missed calls mean missed bookings. AI on-hold, room-to-reception routing, and mobile integration for front-of-house teams.
Construction & Manufacturing
Keep site teams, office staff, and management connected across multiple locations with mobile-first phone systems.
Schools & Education
Handle morning call surges with intelligent queuing, ring groups, and automated attendants that free up admin staff at peak times.
Legal & Professional Services
Call recording for compliance, CRM integration for client files, and reliable call quality that reflects the professionalism your clients expect.
Healthcare & Medical
Ensure patients always get through with priority call routing, out-of-hours messaging, and seamless transfer between surgeries and specialists.
Charities & Non-Profits
Cost-effective systems with flexible pricing for organisations where every pound matters. Scalable as your team and funding grows.
FAQS
Business Phone System - Your Questions Answered
The most common questions from UK & Irish SMEs
For most small businesses, a hosted VoIP or cloud phone system offers the best combination of cost, flexibility, and scalability. Systems like iPECS Cloud require no on-site hardware, include features like auto-attendant and mobile apps, and scale easily as your team grows — with no IT department required.
Cloud VoIP systems typically cost from around £6–£25 per user per month, depending on features and support. On-premise PBX systems involve a higher upfront hardware cost but lower ongoing fees. Yellowcom provides a free consultation and tailored quote based on your team size and requirements.
A traditional landline uses analogue copper wiring to carry voice calls. VoIP routes calls over your internet connection, enabling features like mobile apps, call recording, auto-attendant, and CRM integration — at significantly lower cost than legacy ISDN lines.
Yes. Openreach is switching off the UK's analogue PSTN and ISDN network by January 2027. Any business still using traditional landlines or ISDN systems must migrate to VoIP or a cloud phone system before then. Yellowcom can assess your current setup and manage the transition with no disruption to your business.
A cloud VoIP system can typically be set up within 1–5 business days for most SMEs, with no physical hardware installation required beyond handsets or headsets. On-premise PBX installations vary but Yellowcom's engineers handle everything from cabling to configuration and staff training.
Yes. Number porting lets you keep all your existing business phone numbers when moving to a new system. Yellowcom handles the porting process on your behalf, ensuring continuity with no change to your published numbers.
A hybrid phone system combines on-premise hardware with cloud capabilities. It allows businesses to retain their existing PBX investment while gradually adding cloud features — ideal for multi-site organisations or those planning a phased migration before the 2027 PSTN switch-off.
Yes. Yellowcom supports businesses across the UK and Ireland from offices in Belfast, Glasgow, and Dublin. Our local engineering teams handle on-site installation, configuration, and ongoing support — no offshore call centres.
Yes. Yellowcom offers Microsoft Teams Phone integration, allowing your team to make and receive external calls directly within Teams. Ideal for businesses already using Microsoft 365 who want to consolidate communications into a single platform.
Yellowcom builds resilience into every cloud phone system deployment. Options include 4G failover, call divert to mobiles, and redundant internet connections. In the event of connectivity issues, calls automatically route to team mobiles so your business stays reachable.
Get Started Today
Ready to Upgrade Your Business Phone System?
Talk to a UK-based expert today. We'll assess your current setup and recommend the right solution — no jargon, no pushy sales, just honest advice.
Or email: info@yellowcom.co.uk