The clock is ticking. There are now just 5 months to go until the January 2027 deadline.
If your business is still relying on ISDN or PSTN multi line services, this is the time to take action.
According to the latest update, around 52,000 lines are still using ISDN or PSTN multi line. These services are not compatible with the new network and, importantly, there is no migration path for them.
That means if these lines are not switched before the deadline, they will be ceased.
And once they are ceased, your business could lose those lines altogether.
For organisations that have relied on these numbers for years, this is more than a technology upgrade. These numbers may be connected to customers, suppliers, staff, security systems, alarms, lifts, payment systems or other critical business services.
The risk is not simply waiting until the last minute and assuming there will be an easy migration option.
There won’t be.
With only five months remaining, businesses should be asking themselves:
📌 Are we still using ISDN or PSTN multi line?
📌 How many lines do we have?
📌 Which business services depend on them?
📌 What is the plan for replacing them?
📌 Have we allowed enough time for installation, testing and switching?
The January 2027 deadline is getting very close, and the longer businesses wait, the greater the risk of rushed decisions, limited options and disruption.
If you are responsible for telecoms, IT or business continuity, now is the time to audit your services and identify any affected lines.
Don’t wait for the lines to be ceased before discovering that they cannot be migrated.
Five months may sound like plenty of time, but for a business with multiple sites, hundreds of lines and critical services depending on them, it can disappear very quickly.
Check your ISDN and PSTN multi line services now.
Because when the deadline arrives, these lines won’t simply need upgrading.
Pen Telecom can help you identify affected lines, plan the right migration and make the switch smoothly before the deadline, helping you avoid disruption and losing critical numbers.
They will be ceased, and what is not switched could be lost.
