January 2027 is closer than it looks.
For businesses still relying on ISDN or PSTN multi line services, the time to review your telecoms infrastructure is now.
Around 52,000 lines are still using these legacy services, and they are not compatible with the new network.
More importantly, there is no migration path for these lines.
When the deadline arrives, affected services will be ceased.
And this could mean more than losing an old telephone connection.
Those numbers may be linked to:
📌 Customer and supplier communications
📌 Business-critical phone systems
📌 Security and alarm systems
📌 Lift and emergency communication systems
📌 Payment and other connected services
📌 Internal business operations
For many organisations, these numbers have been part of their business for years. Replacing them at the last minute could create unnecessary cost, disruption and operational risk.
So, what should you do now?
Start with a simple audit.
1. Identify whether your business still has ISDN or PSTN multi line services.
2. Map every number and service connected to them.
3. Assess which services are critical to your operations.
4. Plan the replacement or migration strategy.
5. Allow enough time for installation, testing and a controlled switch over.
Waiting until the final weeks could leave your business dealing with rushed decisions and avoidable disruption.
The January 2027 deadline is not something to put on next year’s to do list.
It needs attention now.
At Pen Telecom, we can help businesses identify affected services, understand their options and plan the transition to modern telecom solutions with minimal disruption.
👉 Don’t wait until your lines are ceased to find out what depends on them.
Five months can pass quickly. Start your telecoms review today.
