Smooth Transition to the ISDN 2025 Switch-off: A Guide for Businesses

The ISDN switch-off is a major event that will impact organisations of all sizes in the UK. In this blog post, we discuss the importance of this transition and provide tips on how you can prepare. 

We have just entered the stop sell phase of the ISDN switch-off. What does this entail?

It means that organisations can no longer purchase new ISDN lines or renew existing contracts. This is a significant milestone in the ISDN switch-off process, and it is important that organisations start planning their migration to a new technology as soon as possible.

Key Points During the Stop Sell Phase: 

What does the ISDN switch off mean for my organisation?

How can you prepare your business for the ISDN switch-off? 

How can DB Comms support with the ISDN 2025 Switch-off? 

DB Comms is a leading provider of business telecommunications solutions for businesses. We can help you prepare for the ISDN switch-off by: 

We understand that running your organisation is your top priority, so let us take care of the ISDN switch-off for you. We'll handle everything from planning to implementation, so you can focus on what you do best. 

Time is key 

The ISDN switch-off is a big change, but it doesn't have to be a headache. DB Comms can help you make the transition to VoIP with ease. We'll take care of everything from planning to implementation, so you can focus on what you do best.

Don't leave your organisation's future to chance. Contact DB Comms today for a personalised consultation and find out how we can help you prepare for the ISDN switch-off. Your smooth transition begins here.

Jargon busting 

ISDN - Integrated Services Digital Network 

PSTN - Public Switched Telephone Network 

VoIP - Voice over Internet Protocol


The Client

Since their beginnings in 1891 when the very first piece of knitwear came off the knitting frames at the Lanark site, Glenmuir has committed itself to create golfwear with impeccable care, skill and dedication to the craft.


In a strive to deliver best in class user experience for its customers and staff alike, Glenmuir were keen to review its ageing telephony and connectivity environment. From a telephony point of view, it was disjointed at best with various providers involved, in addition, their system was end of life and was using legacy ISDN technology. As well as the system being end of life there where crucial limitations in terms of disaster recovery and mobile/remote working options.

What DB Comms did

In terms of connectivity Glenmuir where and are no different to most modern businesses they have a growing dependency on Cloud technology, with email, CRM and many other business-critical applications requiring a fast, reliable internet connection. Historically the business multiple FTTC connections, stitched together all serving different purposes, which served its purpose at the time but failed to deliver dedicated bandwidth, quality of service, ease of failover, or simplicity of service. The business always appreciated the benefits of having a dedicated Ethernet service but had always conceived the set-up costs to be prohibitive.

Outcome for Client

To underpin this new solution Glenmuir took advantage of the Government Gigabit Voucher Scheme (GBVS) , this is a publicly funded pot of £67 million, this can be utilised by businesses in the UK to help them connect to Fibre to the Premises (FTTP), in this scenario, Glenmuir opted for 100/1000 Mbps solution, which would provide them ample bandwidth for their current requirements, whilst providing scalability to meet the future demands of the network.

As part of The project we have deployed our “Cloud Voice Complete” solution, in doing this we offered an easy to administer, flexible and feature-rich system, we eliminated all UK Call spend by providing free local, national and mobile calls. As the system is licensed on a per-user basis, we created a flexible pricing structure to accommodate future growth. By providing a fully managed and inclusive service we have removed the burden of expensive maintenance and engineer call outs.

"DB Comms has been one of our trusted technology advisors for several years, they’ve always gone the extra mile to understand our business and offer solutions that fit our requirements. As a result, myself and my fellow Directors would have no hesitation in recommending DB Comms to any other company looking to review and upgrade their current technology solutions."

Fiona Barclay

Finance Director

Get Digital Scotland

The Client

Get Digital is set up to help increase the digital capabilities of service users and staff within the homelessness sector. They do this by providing training, support and resources. They want people affected by or working in homelessness to experience an improved quality of life by benefiting from the digital world.


The outbreak of the Coronavirus has led to a greater reliance on digital for many of our daily activities: from socializing with friends, managing finances or finding reliable information on health,
the latest news and updates from the government.

Digital has never been so critical to our lives. Social distancing and self-isolation has reduced our ability to communicate face to face. There are many ready-made digital communication tools to help us stay in touch. Email, messaging, and/or video tools are essential in the current climate to reduce social isolation and for people to access support. These tools are vital to help us to connect with the people and organisations in our lives.

What DB Comms did

DB Comms are the first provider of the necessary technology & equipment needed to support this campaign. To help promote digital inclusion, DB Comms has provided handsets and ensured that mobile broadband is accessible within temporary accommodation for those experiencing housing issues during this difficult time.

Outcome for Client

How will this help the project users…

“DB Comms have been extremely helpful, responsive and supportive of this project. They have enabled
us to quickly deliver digital access to the people we support. This will change lives.”

Jamie Trout, Digital Inclusion Programme Manager

Scottish Council for Voluntary Organisations (SCVO)

The Client

We have a long-standing relationship with the Scottish Council for Voluntary Organisations (SCVO) having worked with them and their
members for several years, offering valuable industry knowledge and supporting a range of connectivity and telephony solutions.


Remote Working

Back in March 2020, SCVO identified a need to enhance its mobile and remote working solution. The legacy solution was based on physical hardware, with any options for mobile working requiring expensive licences or additional hardware. This had previously been acceptable as the organisation only had a small number of employees with these needs, however, given Government guidance and National Lockdown, SCVO now had a far wider requirement for mobile and remote working.

What DB Comms did

Teams Telephone System

Through consultation we agreed that the organisation would like to leverage its investment in Microsoft Teams and in particular the Teams Telephone System add on.The Microsoft Teams Telephone System offered the organisation a single endpoint i.e. the Teams app to use for all internal and external communications via voice, video and instant messaging

Direct Routing

Given that the Microsoft Direct Call packages can be slightly restrictive, with the cost of calls and the requirement for users to be linked to a credit card, we were able to offer our ‘direct routing’ platform for Teams Telephone System which not only adds a voice route to MS Teams, but also adds our call management platform so you can build call plans, confirm messages, disaster recovery, voicemail to email and much more via a simple to administer web-based platform – without any technical PowerShell skills required.

Outcome for Client

Not only has the project enabled SCVO to move to a fully flexible remote working solution, allowing them to function as normal as possible throughout the Coronavirus Pandemic, but it provided them with a platform to build their flexible working strategy around in the future.

"DB Comms understood our requirements and future vision for Enterprise voice via the Cloud. They demonstrated excellent knowledge of the Teams Direct. Routing product and how to implement this in a way that would work best for us. The expert consultancy provided ensured a smooth and quick onboarding for our employees. Teams Direct Routing has helped us simplify and streamline business collaboration. We now have an effective single platform for internal and external communications. I’d highly recommend DB Comms to anyone."

Ian Horburgh

IT Manager

DB Comms improves productivity and security for Glasgow Sculpture Studios

The Client

Glasgow Sculpture Studios is a third-sector arts organisation located in the heart of Glasgow, providing 39 individual artist studios and project spaces for rent. The organisation had a shared WiFi network, which was causing a number of issues for the tenants including poor performance, security risks and reduced productivity. To address these concerns, Glasgow Sculpture Studios enlisted the services of DB Comms.


The existing shared WiFi network was presenting a number of challenges for tenants. The network had poor performance, leading to slow internet speed and dropped connections. Security risks were also a concern, as tenants were sharing the same network, increasing the likelihood of cyberattacks. Furthermore, productivity was reduced and tenants struggled to access the internet and use online tools.

What DB Comms did

DB Comms installed a new fully managed WiFi network, which involved installing individual access points in each of the 39 studio and project spaces. Each space was equipped with its own access point and SSID, built on its own private VLAN. In addition, each space was given a wired LAN, which was on the same VLAN as the WiFi providing each tenant with a private, secure wireless and wired data network.

Outcome for client

The new WiFi network provided a number of benefits for tenants, including improved performance, increased security and enhanced productivity. With each tenant having their own access point, internet speeds improved significantly and connections were no longer dropped. In addition, the private VLANs ensured that each tenant had a secure network, reducing the risk of cyberattacks. As a result, tenants were able to work more efficiently, using online tools and accessing the internet without interruption.

DB Comms was able to address the challenges faced by Glasgow Sculpture Studios by installing a new fully managed WiFi network. By providing each tenant with their own access point and private VLAN, the new network improved performance, security and productivity. Glasgow Sculpture Studios was pleased with the results and is now able to offer studio holders a high-quality WiFi network, enhancing their overall experience at the organisation.

Vittoria Group


The Vittoria Group, Edinburgh's favourite Italian family restaurant, features award-winning eateries around the city. An Edinburgh institution since 1970, the Group also has four La Favorita Delivered take away shops which sell and deliver their award-winning pizzas across Edinburgh.


The previous telecoms set up across five restaurants, four takeaway shops and one head office were the result of supplier decisions made from necessity rather than value or service and due to rapid growth our client ended up with a situation that was less than desirable.


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