If your business is still using PSTN or ISDN multi-line services, now is the time to take action.
And there is another reason not to delay.
From 1 October, BT is increasing prices for analogue services and ISDN by 40%, adding further cost for businesses that have yet to migrate.
With around 52,000 lines still using these legacy services, many organisations could soon be facing both higher costs and increasing pressure to move away from outdated infrastructure.
The bigger concern?
These services cannot simply continue as they are.
When the January 2027 shutdown arrives, affected legacy services will be ceased.
And the impact could go far beyond your telephone system.
Your business may rely on these lines for:
📌 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 some businesses, these numbers and services have been in place for many years. Discovering their dependencies at the last minute could lead to unnecessary costs, disruption and operational risk.
What should you do now?
A simple telecoms audit is a good place to start:
1. Identify any PSTN or ISDN multi-line services still in use.
2. Map every number, device and system connected to them.
3. Assess which services are critical to your operations.
4. Choose the right replacement or migration strategy.
5. Allow time for installation, testing and a controlled switchover.
The worst time to discover that a critical business system depends on an old telephone line is after that line has been switched off.
January 2027 may sound like it is still a long way off.
It isn’t.
At Pen Telecom, we help businesses identify legacy services, understand what is affected and plan their move to modern telecoms solutions with minimal disruption to day-to-day operations.
👉 Don’t wait for your lines to be ceased before finding out what depends on them.
Start your telecoms review today.
