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On Premise PBX 

Transition to a modern feature-rich voice solution 

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2025 ISDN will be switched off
2020 Switch off process begins
Over 1 million Businesses use ISDN currently

PBX solutions for all circumstances 

BT has announced it will switch off its Integrated Services Digital Network (ISDN) by 2025, starting the process in 2020. Now is the time to transition to a modern, feature-rich, and future-proof voice solution.  

Your people want to be able to work from anywhere at any time without compromising the quality of the connection. While many companies nowadays are choosing a Hosted Voice solution, you may want to opt for a predictable upfront investment which will work no matter the environment.  

At Chess, we partner with the on-premise PBX leaders and offer flexible leasing options on various terms to help you reduce your costs, connect your people and ensure you can work better together. 

Benefits of on-premise PBX systems 


Financial Flexibility  

With an on-premise PBX you can pay for it all upfront and pay an annual support charge. Equally lease options mean that if you want to you can lease the system and spread the payment over the term of the lease. 

Feature Rich 

Often that one feature that your business needs doesn’t exist on a new cloud solution – and you must change the way you work or not move to the cloud. Customers may only discover this when they have moved and this might be too late. 

Devices and Local Connectivity 

On premise systems offer a huge range of device options, specifically manufactured to complement each other -  handset, feature phones, reception consoles – or even the ability to easily link to local systems such as public address systems, door entry systems, hotel billing systems, mobile telephony, and remote workers. 


Selecting a mature, on-premise system gives you flexibility from home-working through to multi-site settings and mobile applications, usually designed from the ground up to deliver a seamless user experience. 

Protecting Investment 

In larger businesses, we see a desire to protect the investment in devices and systems. Simply upgrading the system can be a better option as this does not involve replacing all your devices and retraining the whole business. 

How We Work With You


Our team of experts will assess your environment and advise on the implementation of best voice solutions – connect your people from anywhere and any time 


Our engineers boast the latest accreditations from leading bodies and will deliver the solution and help you rollout enhanced features. 


We can provide you with training and materials to ensure your people adopt fully the new technology and help them to work better together. 


You can also choose our expert team to provide continuous support throughout your journey, helping you to stay connected at all times. A variety of managed support options available.  

Related Resources


Unify OpenScape Guide


Avaya IP Office Guide



BT ISDN Switch Off - Are You Ready?

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