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The National Domelight Company

The National Domelight Company

Windsor Telecom helps The National Domelight Company say goodbye to ISDN.



The National Domelight Company, part of IDCC Limited, is the UK’s leading supplier of dome lights, rooflights, skylights and smoke vents. With over 30 years in business, the family-run specialist is focused on providing the best advice and guidance together with quality products and dedicated support.



The National Domelight Company was operating out of a single office using an analogue PBX system with an ISDN line as their main communication solution. When Covid-19 forced many UK businesses to work from home in Spring 2020, the team found that it simply wasn’t possible. Their ISDN setup offered very little flexibility. They were unable to make or receive business calls when they were out of the office which made operating during lockdown near impossible.

They were also frustrated by having to pay high phone line rental bills for technology that was unreliable, patchy and slow. So, knowing that BT was planning to switch off their ISDN service in 2025, they decided to get ahead of the curve and move to a more up-to-date infrastructure.



As Windsor Telecom already provided their IT support services, The National Domelight Company approached us, as a known trusted advisor, to help them work through a solution. They needed updated and future-proofed technology that would allow them to work remotely, be productive in any location and provide a better experience to their customers.

Windsor Telecom worked with them to implement Microsoft 365 to provide a cloud-based collaborative and flexible suite of office applications. We also provided which included a wide range of call handling features and inclusive minutes, integrated with Microsoft Teams to allow them to make and receive calls from any device and location.

To improve the customer experience, we added call tagging to their new phone solution, which allows the call recipient to see the IVR menu option the caller selected. Now every colleague was ready to answer the call the way the customer needed.


“We’ve trusted Windsor Telecom for a number of years with our IT support and are so happy that we approached them to modernise our outdated ISDN comms with Microsoft 365 and a VoIP phone system to set us up for the future. With Windsor, it’s the little things that make the big difference – their willingness to listen and suggest ways of working that we hadn’t even thought of ensured that the final solution surpassed our original requirements. I know I can just pick up the phone, knowing they’re there to help, I don’t think you could ask for more.”

– Scott Couldrey, Managing Director


With Microsoft 365 and a new feature-rich cloud telephony solution, The National Domelight Company is now ready to continue growing their business and delivering an even greater service to their customers. Plus, the integration with Microsoft Teams has given them the flexibility to operate from anywhere, regardless of device so they’re safe in the knowledge that they’re ready for whatever comes next.



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