
Business VoIP Phone Service
CloudTech24 offers an advanced business VoIP phone service from Nebula designed to meet modern communication needs. The CallSwitch One solution provides seamless connectivity, whether your team is in the office, working remotely, or on the move.
Key features
- Multi-device compatibility: Access your VoIP system via desk phones, PCs and laptops, or mobiles
- Managed migration: Our dedicated team will ensure a seamless phone system migration
- Unified communications: Integrate voice, video, and messaging into a single platform
- Secure administrative dashboard: Provides a window into your account and user profiles
- 24/7/365 support: Our expert team is available around the clock to assist with any issues or questions.
Ready to unify and future-proof your communications?
CloudTech24 partner with Nebula, to offer our customers the CallSwitch One business VoIP phone service. CallSwitch One delivers enterprise-grade communications with advanced features, and 24/7/365 support from the expert CloudTech24 team.
We handle migrations, custom configurations, and deployments, ensuring your teams get an industry-leading unified communications platform that can be centrally managed through a secure dashboard.
With two licencing tiers that incorporate different features, the CallSwitch One VoIP system is perfect for both SMEs and large enterprises. The platform is hosted in Google Cloud, benefitting from worldwide availability, scalability, resilience and bast-in-class DDoS prevention.

VoIP security and compliance
At CloudTech24, we prioritise the security of your communications. We use a number of privacy measures to keep sensitive business information safe:
- End-to-end encryption: Protect sensitive conversations with robust encryption protocols
- Regular updates: Our systems are consistently updated to safeguard against emerging threats
- Compliance: Our services adhere to industry standards and regulations, ensuring your VoIP solution meets compliance requirements.
These measures ensure that your business can confidently use your VoIP system, in the knowledge that the CloudTech24 service meets regulations and the strict requirements for protecting data.

We let the numbers do the talking
At CloudTech24, we’re proud of the results we deliver for our clients. With a 96% year-over-year client retention rate, we’ve built lasting relationships by consistently providing reliable and effective solutions.
Today, we support over 250 customers across more than 10 countries worldwide, showcasing our ability to scale and serve businesses globally. What sets us apart is our speed and efficiency. We resolve issues in less than 68 minutes on average, ensuring our clients get the support they need without delays. These achievements reflect our commitment to delivering exceptional service and value every single day.
96%
Retention of current clients YoY
250+
Customers in over 10 countries worldwide
<68
Minutes to issue resolution

Book a discovery call
Book a time that works for you to talk to our sales team about how a team of global engineers from around the world deliver 24/7 cybersecurity and IT services.
FAQs about our business VoIP phone service
We often receive questions about our CallSwitch One business VoIP phone service, so where are some helpful FAQs. Of course, you can also contact us directly – we would be more than happy to help.
Can I migrate my existing phone number to a VoIP system?
Yes. We are very familiar with the process of moving an existing phone number into the CallSwitch One VoIP system.
How long does it take to set up VoIP?
The CloudTech24 IT Operations team handle the entire process, and it is possible to do a same day VoIP setup.
Are VoIP phones more expensive?
Despite VoIP phones being more expensive, the cost of a CallSwitch One licence can bring significant cost savings when compared to traditional phone lines.
What is the best VoIP solution for a small business?
CloudTech24 offer two inclusive CallSwitch One licence tiers, with different features.
CallSwitch One S is the foundational business licence and is ideal for small businesses with more basic VoIP requirements.
CallSwitch One Pro is a full UCaaS solution with a range of tools for maximising employee efficiency and customer experience, including CRM integrations, voicemail to email transcription, Microsoft Teams voice integration, call recording, reporting and AI call transcription and summaries.
Can I have VoIP with desk phones?
Yes. The CallSwitch One VoIP system is compatible with VoIP-enabled desk phones and conference devices, giving you a traditional phone experience with advanced call management features.
What happens with VoIP in the event of power outages?
VoIP services rely on internet connectivity, so if your network or power goes down, your VoIP service may be interrupted. To mitigate this, we recommend using battery backup systems (UPS) and mobile app failover features for continued access during a power cut.
Trusted by over 250 companies globally
More than 250 companies trust us to manage their IT and cybersecurity. We’re known for our rapid response and friendly service. Not tech savvy? No problem; we explain what we’re doing in plain English, so you know what to expect and have clear timelines. You’ll always receive a warm welcome from our team.



























CloudTech24 manage our ICT equipment end-to-end, from sourcing and configuring laptops and devices to installing software, security tools and updates before issuing equipment to staff. New starters receive devices ready to use from day one, making onboarding smooth and efficient.
Their remote support is excellent, allowing issues to be resolved quickly with minimal disruption. The CloudTech24 team are responsive, knowledgeable and communicate clearly when supporting staff.
They also provide valuable business continuity support through spare laptops and rapid replacement arrangements, helping minimise downtime when issues arise.
CloudTech24 has also been instrumental in strengthening our cyber security, particularly through our Cyber Essentials and Cyber Essentials Plus journey. Their guidance, expertise and proactive approach have been invaluable.
Day-to-day support is consistently strong. They respond promptly to tickets, assist with troubleshooting, proactively flag suspicious emails and potential phishing attempts, and help us maintain a secure IT environment.
The account management is excellent. Our account manager understands our organisation, is responsive to our needs and acts as a trusted adviser rather than simply a supplier.
What stands out most is that CloudTech24 feels like an extension of our team. They are proactive, reliable and genuinely invested in helping us improve our IT infrastructure, security and ways of working.
Overall, we’ve been extremely happy with CloudTech24 and would have no hesitation in recommending them. Having worked in finance and operations for over 20 years and worked with a number of IT support providers during my career, I would say CloudTech24 has been the best IT partner I’ve worked with.