What is a cloud phone system?

A cloud phone system (also called hosted VoIP) routes your business calls over the internet rather than traditional phone lines. The system infrastructure is hosted in secure data centres, meaning you don't need on-site PBX hardware. You pay per user licence, calls are made via desk phones, mobile apps or softphones, and management is handled remotely — making cloud systems more flexible and cost-effective than traditional setups.

What is VoIP and how does it work?

VoIP stands for Voice over Internet Protocol. It converts your voice into digital data and transmits it over your internet connection, rather than traditional copper phone lines. Calls can be made from desk phones, computers, or mobile apps. For businesses, VoIP offers significant cost savings, greater flexibility, and a much wider range of features than analogue or ISDN lines.

How much does a cloud phone system cost?

Most cloud phone systems are priced on a per-user, per-month licence model — typically from £12 per user per month depending on the platform and features. There are no large upfront hardware costs and maintenance is handled remotely. Yellowcom provides bespoke quotes based on your user count, call volumes, and requirements.

Can I keep my existing phone number when switching to VoIP?

Yes. Yellowcom handles full number porting as part of every installation. Your existing geographic or non-geographic numbers are transferred to your new cloud system with zero disruption to incoming calls. The porting process is managed entirely by our team.

What broadband speed do I need for a cloud phone system?

A stable VoIP call requires around 100kbps of bandwidth per concurrent call — well within most business broadband connections. More important than raw speed is connection quality; low latency and minimal packet loss are critical for clear calls. Yellowcom includes a full VoIP connectivity assessment with every installation.

What happens to my phones if the internet goes down?

Modern cloud phone systems include built-in failover options. With iPECS Cloud, calls can be automatically diverted to mobile numbers or an alternative site if your main connection fails. Yellowcom also supplies business broadband with 4G/5G failover as an add-on, giving you a secondary connection that activates automatically.

Is a cloud phone system suitable for small businesses?

Absolutely. Cloud phone systems are particularly well-suited to small businesses — no large upfront costs, no hardware to maintain, and you only pay for the users you need. Systems like iPECS Cloud can start with as few as 2 users and scale as you grow.

What is the PSTN switch-off and how does it affect my business?

BT's Public Switched Telephone Network (PSTN) is being switched off in the UK by January 2027. All businesses using analogue lines or ISDN must migrate to VoIP or a cloud-based alternative before the deadline. In Ireland, a similar copper network migration is planned under ComReg's roadmap. Yellowcom manages the full transition for you.

What is the difference between cloud and on-premise phone systems?

With a cloud phone system, all infrastructure is hosted in data centres — you simply connect your phones via the internet. With an on-premise system, a PBX unit is physically installed on your site. Cloud systems require lower upfront investment, are easier to scale, and are maintained remotely.

Does Yellowcom cover the whole of the UK and Ireland?

Yes. Yellowcom supplies and supports cloud phone systems across Northern Ireland, Scotland, England, Wales, and the Republic of Ireland. We have offices in Belfast, Glasgow, and Dublin, with local engineers available for on-site installations and support — no offshore call centres.

Business Phone Systems - UK & Ireland

Business Telecoms Solutions in Derry/Londonderry

Businesses in Derry/Londonderry need fast, flexible, and reliable communication systems to stay competitive. Whether you’re managing a growing team, supporting remote workers, or improving customer experience, having the right telecoms setup is essential.

At Yellowcom, we provide complete business phone systems in Derry/Londonderry, combining cloud phone systems, business mobiles, and high-speed broadband into one seamless package. One provider, one bill, and one expert team supporting your business.

Last reviewed: April 2026

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We’ll assess your setup and recommend the right system, no obligation.

Your Local Telecoms Partner

Need Help with Business Phone and Broadband?

Whether you’re a growing start-up or an established enterprise, reliable communications are the backbone of your business. At Yellowcom, we deliver fast, dependable business broadband and feature-rich business phone systems that keep your team connected, your customers happy, and your operations running smoothly.

From our bases in Belfast, Dublin, Scotland, and supporting businesses in Derry/Londonderry, we provide tailored telecoms solutions across every sector, combining high-speed broadband, VoIP and cloud phone systems, and mobile connectivity with local expertise..

03330 156 651

Free Consultation

Best - in - class systems

Four Core Solutions. One Trusted Partner.

We don't push one-size-fits-all. Yellowcom are certified partners with Ireland's leading technology platforms, so we recommend the right system for your business, not the easiest one to sell.

Cloud Phones

iPECS Cloud · Ericsson-LG

The most feature-rich hosted VoIP platform on the market. Simple, scalable, and powerful.

130+ CRM integrations
3 months free call recording
Mobile and desktop apps

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Broadband

High-Speed · FTTP

Reliable, business-grade internet that forms the foundation of your communication system.

Guaranteed speeds
99.9% uptime SLA
Dedicated UK and Ireland support

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IT Support

Total Management · UK and Ireland

Complete IT solutions to keep your business running smoothly. Cybersecurity to cloud migrations.

24/7 proactive monitoring
Advanced cybersecurity
Remote & on-site support

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Mobiles

Flexible Plans · Major Networks

Keep your team connected on the move with business-grade mobile solutions.

Major networks (O2, EE, Vodafone)
Shared data pools
Flexible contract terms

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Customers

0 +

17+ Years in Business

Business Phone Systems & VoIP in Derry/Londonderry

We’ve been delivering business phone systems in Derry/Londonderry and across Northern Ireland for more than 15 years. During that time, we’ve built strong, long-term relationships with businesses in sectors including construction, healthcare, legal and professional services – all benefiting from reliable telecom solutions backed by local support.

As a trusted provider of business phone systems in Derry/Londonderry, we offer everything from to on-premise solutions, including advanced platforms like iPECS, with expert guidance to ensure your communications are set up correctly from day one.

Upgrading to modern telecom technology gives your business a competitive edge. From cost savings and advanced call analytics to remote working capabilities, high-speed , secure customer Wi-Fi, built-in failover for business continuity, and flexible – everything is designed to keep your team connected and productive.

If your business is looking to improve efficiency, enhance customer experience, and stay flexible as you grow, the best voip system in Derry for small businesses could be the ideal solution. Get in touch today to find out how we can support your communications and help drive your business forward.

Cloud Phone Systems for Derry/Londonderry

Make and receive calls from anywhere with desktop, mobile, or desk phone access. Our cloud systems are built for hybrid and remote teams, offering advanced features like call routing, reporting, and voicemail-to-email.

Never Miss a Call

Route calls to any device, ensuring your customers always reach someone.

Instant Routing

Get callers to the right team instantly with advanced IVR and hunt groups.

Easy Scaling

Add or remove users in seconds via a simple web portal.

⚡ UK PSTN Switch-Off: January 2027 — Is Your Business Ready?

All traditional analogue and ISDN lines are being switched off. Businesses still on old phone lines must migrate to VoIP or cloud systems before the deadline. Ireland's copper network migration is also underway. Yellowcom manages the full transition for you.

Check Your Readiness →

For Growing Businesses

YOUR TELECOMS PARTNER IN DERRY/LONDONDERRY

Built for growing businesses in Derry/Londonderry, our solutions combine flexible telecoms with local engineering support, expert tech teams, and a dedicated account manager to keep everything running smoothly.

Cloud vs On-Premise

Which Phone System is Right for Your Business?

Not sure if cloud is the right fit? Here's an honest comparison - we'll help you choose the best voip phone system for small buinesses in Derry, even if that's not a cloud system.

What matters to you	☁️ Cloud / Hosted VoIP	🖥️ On-Premise PBX	🔀 Hybrid
Upfront cost	Low — no hardware	Higher — PBX unit + install	Medium
Monthly cost	Per-user licence	Line rental + maintenance	Mixed
Remote / hybrid working	✓ Excellent	Limited	✓ Good
Scalability	Add users instantly	Requires engineer visit	Moderate
Maintenance	Remote — handled by us	On-site engineer required	Mixed
Internet dependency	Yes — stable connection needed	✓ Fallback to PSTN	Partial
PSTN switch-off ready	✓ Fully compliant	Requires SIP upgrade	✓ With SIP trunks
Best suited for	Growing, hybrid, multi-site	Stable, single-site, specific compliance	Transitioning from on-premise

☁️ Cloud / Hosted VoIP — Recommended

Upfront costLow — no hardware

Monthly costPer-user licence

Remote working✓ Excellent

ScalabilityAdd users instantly

MaintenanceRemote — handled by us

Internet neededYes — stable connection

PSTN ready✓ Fully compliant

Best forGrowing, hybrid, multi-site

🖥️ On-Premise PBX

Upfront costHigher — PBX unit + install

Monthly costLine rental + maintenance

Remote workingLimited

ScalabilityRequires engineer visit

MaintenanceOn-site engineer required

Internet needed✓ Fallback to PSTN

PSTN readyRequires SIP upgrade

Best forStable, single-site

🔀 Hybrid

Upfront costMedium

Monthly costMixed

Remote working✓ Good

ScalabilityModerate

MaintenanceMixed

Internet neededPartial

PSTN ready✓ With SIP trunks

Best forTransitioning from on-premise

Customer Reviews

What Our Customers Say

4.9

650+ Trustpilot Reviews

“We didn’t realise how much time and cost was being lost having three separate telecom providers — Yellowcom solved that in one move. The new cloud system is seamless.”

George

Lisney Belfast · Property

“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

“Having local engineers available makes a huge difference. When we had a question after going live, someone picked up the phone — not a chatbot, not a call centre queue.”

Michael

Construction company · Glasgow

Industries We Serve

Cloud Phone Systems Tailored to Your Sector

Every industry has different communication challenges. We understand yours and we've built solutions that fit how you work.

Hotels & Hospitality

Seamless guest room communication, efficient front desk routing, and reliable connectivity – so every call becomes a booking opportunity.

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Construction & Manufacturing

Keep site managers and office teams seamlessly connected with mobile twinning and softphone apps – no matter where the job takes them.

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Schools & Education

Scalable communication systems for schools and colleges, built to manage peak call volumes with easy term-time routing.

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Legal & Professional Services

Stay compliant, improve accessibility with direct dial numbers, and keep client records accurate through seamless CRM integration.

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Healthcare & Medical

Keep patients connected with reliable phone systems for GP surgeries and clinics, featuring call queuing and seamless out-of-hours routing.

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Charities & Non-Profits

Affordable cloud phone systems designed to stretch your budget further, with flexible pricing and essential business features included.

See charity solutions →

Business Telecoms Solutions in Derry/Londonderry