DMS delivers managed VoIP phone systems for organisations moving away from legacy ISDN infrastructure ahead of the January 2027 switch-off, scaling across multiple sites, or consolidating communications into a single platform. We handle everything — design, migration, number porting, and ongoing support — so your team stays connected without the disruption.
VoIP (Voice over Internet Protocol) phone systems route calls over the internet rather than traditional copper phone lines. Instead of a physical exchange, VoIP converts voice into digital data packets and transmits them over your broadband or private network connection — enabling calls to any device, anywhere in the world.
For businesses and public sector organisations, this means no dependency on ISDN lines — which BT has already withdrawn for new connections, with full PSTN switch-off scheduled for January 2027. Beyond the deadline, VoIP delivers lower call costs and a simpler way to manage your phone system from a single admin portal.
Modern VoIP platforms integrate with the tools your team already uses — Microsoft 365, CRM, helpdesk software — allowing staff to make and receive calls from their laptop, desk phone, or mobile on a single number. For organisations already on Microsoft 365, our Microsoft Teams Phone service adds full external calling capability directly within Teams.
VoIP is a practical, cost-effective replacement for ageing telephony infrastructure. DMS has been delivering telecoms solutions alongside managed IT services since 2005. We manage the full lifecycle — from assessing your current setup and recommending the right platform, through to installation, number porting, and ongoing support. We work with a range of VoIP providers and hardware, so the recommendation is always based on fit — not which product we happen to sell.
To find out how a managed VoIP solution could work for your organisation, book a free 15-minute call with our team or contact us using the form below.
