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ISDN Switch-Off

  • all you need to know about the PSTN & ISDN switch-off in 2025

prepare your business telephone lines by migrating to voip today

In 2015 BT Openreach announced their intention to gradually switch off their PSTN and ISDN services. The telecoms provider began shutting down networks in 2020 and will stop installing new ISDN lines by September 2023. By December 2025, PSTN circuits will be shut off completely, leaving traditional phone lines inoperative.

Due to the withdrawal of BT’s PSTN and ISDN services, you should consider moving your business phone lines away from ISDN as soon as possible.

You may think you still have plenty of time to migrate to VoIP, but for many companies, the migration is happening NOW.

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JARGON BUSTER

Here’s a summary of the terms we’ll be using throughout our PSTN and ISDN summary:

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pstn

PSTN stands for Public Switched Telephone Network – the old circuit-switched network that powers traditional telephone lines and cables.

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ISDN

ISDN stands for Integrated Services Digital Network. It uses digital transmission to make phone calls and transmit data over the circuits of the PSTN.

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TRADITIONAL TELEPHONY

Traditional telephony systems, such as PSTN and ISDN systems, run on a premise-based physical box, that is connected by wires to individual phones.

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VoIP

Voice over internet protocol (VoIP) is a type of phone system that uses an internet connection to make and receive calls. The eliminates the need for telephone boxes and cables.

why are pstn & ISDN services being switched-off?

The nature of telecommunications has changed drastically in the past decade, so much so that PSTN and ISDN services can no longer offer the fast communication that customers require today.

With that, BT Openreach has decided to stop investing money and labour into a technology that can’t fulfil the needs of the modern business landscape. Instead, they’re paving the way for a fully cloud based network that can meet customer demands as well as the demands of a new technological era.

HOW WILL THE SWITCH-OFF AFFECT YOUR BUSINESS?

After December 2025, all PSTN and ISDN services will be switched-off, so traditional telephone lines will no longer work. 

Other technology systems that run on traditional telephone lines – such as CCTV cameras, fax machines and point-of-sale (EPOS) devices – will also be affected and will no longer work as required.

Around 2.4 million businesses in the UK still operate on PSTN or ISDN, most of which are SMEs – if you’re one of them you should start planning your move to VoIP today. Your migration to VoIP will dramatically impact your business operations if you don’t leave enough time to plan and implement that correct solution for your business. 

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What is voip?

VoIP stands for voice over internet protocol and is a cloud-based telephony solution.

VoIP can also be referred to as “internet telephony” and “IP telephony”.

VoIP services transmit voice and multimedia content via an internet connection. This means phone and video calls can be made from anywhere, at any time, using only a mobile device and an internet connection, which makes VoIP the perfect solution for businesses with remote and hybrid workers.

VoIP typically includes other features that aren’t available with traditional phone systems. These features can include call recording, custom caller ID, and voicemail to e-mail. This is why VoIP is also known as a unified communications (UC) solution.

As VoIP systems are cloud-based, they eliminate the need for telephone boxes, cabling and other on-site hardware.

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Key Features & benefits of voip:

improved call analytics

VoIP phone systems track call data and come with an easy-to-navigate interface that can be used to create insightful reports. Reports provide actionable insights that can be used to boost business performance.

advanced call management

VoIP systems provide many useful service tools, such as automatic callback, priority call, call parking and call recording. These features can be used to handle incoming calls and improve customer satisfaction.

lower call rates & overall costs

Calls rates are cheaper using VoIP. Landline calls are expensive as phone lines can't cope with demand. VoIP also offers cheaper international calls and with flat-rate monthly fees, VoIP means you won't receive any unexpected billing surprises.

mobile app interface

Using only a VoIP app you can take your entire work phone system with you on your smartphone. VoIP apps allow for seamless mobile working wherever you are and provide features such as call holding, call routing and more.

heightened business scalability

VoIP offers easy business scalability, making it an ideal solution for businesses eyeing expansion. You won’t have to purchase additional hardware or extensions to scale your operations since VoIP is a digital network.

enables easy remote working

VoIP services are cloud-based, so calls can be made from anywhere, at any time, using any mobile device. All you have to do is add your device to the cloud network and route your calls.

business text messaging

SMS through VoIP allows you to send texts, using an internet connection, through VoIP enabled devices. By sending texts through VoIP, your business can reach a broader customer base at once and save money.

video conferencing

VoIP systems offer plenty of functions beyond audio functionality. You can hold video conferences and send photos and documents in the middle of the conversation. VoIP systems with these features are known as Unified Communications (UC).

how to migrate to voip

VoIP phone systems offer a wealth of business benefits, including an easy setup process. For a step-by-step guide on how to switch from ISDN to VoIP please see our handy guide below.

ISDN to voip migration guide

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alternative ISDN telephony Services from dvad:

Transform your business today with our innovative and future-proof telephony services:

Hosted Telephony

HOSTED VOIP TELEPHONY

A hosted VoIP phone system is a unified communication solution that is hosted in the cloud. You can make and receive calls using IP handsets, mobiles or other devices, with the communication delivered via the internet.

Telephony Systems

TelephonE Systems

Our expert and professional business phone systems enable you to never miss a call and stay connected with colleagues, partners, suppliers and customers.

Telephone Maintenance

Telephone maintenance

Providing you with peace of mind and ongoing technical support, DVAD offers a range of maintenance packages. We want to make sure that your system keeps working to support your business, plus any required changes can be rapidly actioned so that you are not hindered by technical issues or faults.

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