Business Connectivity & PSTN Switch-Off Support for UK Businesses

Helping UK Businesses Transition to All-IP

The UK is moving to an all-IP future. Whether you’re replacing PSTN or ISDN lines, upgrading your broadband to full-fibre, or rolling out cloud telephony, 4th Platform plans and delivers a smooth, disruption-free transition — with no impact on your day-to-day operations.

The Switch-Off at a Glance

Final switch-off target: January 2027.

Stop-sell since 5 September 2023. New PSTN/ISDN orders and many changes are now blocked.

The path forward is all-IP. Migrate to VoIP (Voice over Internet Protocol) with reliable fibre connectivity.

We do the heavy lifting. Discovery, audit, migration plan, and user training — all managed by 4th Platform.

Solutions We Deliver

Connectivity: SoGEA (Single Order Generic Ethernet Access), FTTP (Fibre to the Premises), Leased Lines, SD-WAN, 4G/5G backup.

Cloud Telephony: PhoneLine+, Gamma Horizon, Microsoft Teams Phone.

Migration Services: Readiness audit, site surveys, porting, pilot, phased rollout, legacy device testing for alarms, EPOS, and telecare systems.

Continuity & Security: Power resilience options, battery backups, emergency calling guidance, router and firewall QoS (Quality of Service).

Your PSTN Switch-Off Playbook

Explore the key milestones, options, and checklists in our interactive Flipbook — designed for sharing with non-technical stakeholders and decision-makers.

Timeline to All-IP

2023
National stop-sell on PSTN (Public Switched Telephone Network) / ISDN (Integrated Services Digital Network).
2024
ADSL (Asymmetric Digital Subscriber Line) stop-sell; fibre first.
2025–2026
Migration window: audit → pilot → phased rollout.
Jan 2027
PSTN & ISDN switched off (target).