Migrate from legacy ISDN, PBX and traditional telephony to modern cloud-hosted communications. Reduce costs, improve flexibility and prepare for the 2027 PSTN switch-off.
Get a Free AssessmentBT is switching off the Public Switched Telephone Network (PSTN) — the infrastructure that carries traditional phone calls — by January 2027. Every business using an ISDN line, a traditional PBX, or any legacy telephony will be affected. This is not optional and it is not far away.
But the PSTN switch-off is also an opportunity. Businesses that act now — rather than waiting for the deadline — can move to modern, cloud-hosted communications that are cheaper, more flexible and better for remote and hybrid working.
Voice transformation typically involves migrating from one or more of the following legacy systems to a modern alternative:
Modern cloud voice platforms do far more than replace a phone line. They integrate voice, video, messaging and collaboration into a single platform — accessible from any device, anywhere. For businesses with hybrid or remote workers, this is transformative.
Open Way Technologies has access to leading hosted UC platforms through our provider network, including solutions with 100% uptime SLAs, sub-1ms jitter (PoP to PoP) and coverage across 115 countries — suitable for businesses of all sizes from SMEs to multinational enterprises.
If you have recently invested in a PBX and are not ready to replace it, SIP trunking can replace your ISDN lines while keeping your existing handsets and PBX in place. This is a lower-cost, lower-disruption intermediate step that still achieves PSTN compliance ahead of 2027.