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What does the PSTN Switch Off mean for your business telecoms?

In this article, you can learn which products are retiring - and start planning how to navigate the transition to All IP telecoms.

The first step in any journey is planning. To understand how and where you need to get to in your journey to All IP, you must first understand and plan for what products will be retiring with the PSTN Switch Off.

Below is a quick summary of the top 5 products that will be majorly affected by stop sell on 5 September 2023 - and will be fully retiring by the end of 2025:

Asymmetrical Digital Subscriber Line (ADSL) is a type of broadband that utilises the existing copper wires of telephone lines from end to end. It is this product’s use of the copper wires that is causing it to retire with the PSTN Switch Off

Fibre to the Cabinet (FTTC) is another product that uses the Public Switched Telephone Network’s (PSTN) copper wires. It is easy to confuse this product as future-proof given that it has fibre in its name. While FTTC does use fibre optic cables to connect your business to the local cabinet, FTTC utilises traditional copper wire to communicate back to the exchange, which will expire with the retirement of the PSTN

Single and Multi-line Analogue lines are traditional telephone lines with one phone number attached to them. Depending on the type of line, it can take either a single call or several calls at a time. These lines will retire with the PSTN Switch Off

Integrated Services Digital Network (ISDN) 2 and 30 lines are digital phone lines that provide multiple channels for voice, data, and video transmission. They will be retiring with the PSTN Switch Off because these services rely on the traditional copper-based infrastructure that will no longer be supported after 2025

It’s important to note that any product within your business that’s using a traditional phone line will no longer work after the Switch Off. Other than your telephone system this may also include fire alarms, alarm systems, fax machines, and card payment machines.

Get in touch with us to find out how you can better prepare your business for the PSTN Switch Off. Call 01603 550044 or email


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