The big telephone network switch-off

In this article, we look at some of the key issues surrounding the planned 2025 PSTN switch-off, the move to VoIP, and what options businesses have going forward.

What’s Happening?

Back in April, BT Openreach announced that starting from the end of this year (and finishing in 2025), it will be “switching off the UK telephone network as we know it” by moving 15 million lines to a VoIP (Voice over Internet Protocol) based replacement telephone service. In essence, this means that the Internet (broadband) will be used to carry telephone calls rather than traditional copper wires.  Switching off the UK’s traditional public switched telephone network (PSTN) will also mean the end for ISDN because it uses the copper wire phone network.  Also, BT Openreach will not be accepting new orders for PSTN, and ISDN2 and ISDN30 services after September 2023.

Why?

As noted by Ofcom, the old PSTN is reaching the end of its life and is becoming increasingly difficult and costly to maintain, and Openreach may be looking to ditch the legacy copper network completely, so it won’t have to pay to run two parallel networks. Also, there are now more up-to-date alternatives that are compatible with how we communicate today i.e., mobile and Internet communications. Broadly speaking, some advantages for customers of the switch-over to VoIP could include:

VoIP offers a greater breadth of capabilities. Cost savings and fewer system failures and outages. Scalability and portability (VoIP phone systems can go wherever the company goes).

– Greater communications-mobility, flexibility, and increased productivity and collaboration. The importance of this has been particularly well-illustrated with the need to use remote, cloud-based communications and collaborative working platforms during the pandemic.

Better security that’s continuously updated. Greater reliability. Improved customer experiences. Clearer calls, making it easier to keep existing numbers, and the choice to have broadband provided separately from the telephone service. Better identification and prevention of nuisance calls, thereby saving businesses time and money and potentially protecting against scammers.

Challenges and Disadvantages

There are, however, quite a few potentially serious disadvantages (for some customers/customers groups) to switching over.  These could include:

Potential problems with latency. Vulnerability to phone systems going down and causing (costly) business disruption if there’s a broadband outage or if the electricity supply is interrupted. Older customers and/or customers in rural areas/areas poorly served by broadband may be at a disadvantage. A lack of awareness in the marketplace about the planned switch-over, and a large number of small businesses in the UK are still using legacy lines.

Not Just Phone Lines, But Downstream Services Too

Ofcom and Openreach have acknowledged that a big area of concern, if preparations are not made sufficiently in advance of the switch-over, is how downstream services will be affected. These include security and fire alarms, telecare devices and panic alarms, retail payment terminals/EPOS, and equipment for monitoring and controlling networks.  Specifically, these downstream services rely on some attributes of the old copper PSTN that may not be fully replicated in VoIP-based platforms, hence the importance of adequate preparation before the big switch-over in 2025.  This will require service providers to test their equipment to see if it will continue to function over IP and then replace, upgrade, or reconfigure it as appropriate. These service provider businesses will also need to ensure that customers (from residential users to large commercial and public sector entities) are made aware of the issue well in advance so that necessary steps can be taken to maintain service(s).

Ofcom has stated that the government will work with the sectors that use these downstream services (e.g., health, energy, transport, and business) so that they are aware of the change and can prepare in time.

Is BT Pushing Customers To Switch To Their VoIP?

Some tech and communications commentators (and smaller IT and comms companies) have noted that while BT is raising awareness about the switch in 2025, it also appears to be pushing for businesses to give up their PSTN lines and move to BT’s VoIP solution.  For example, as noted by the Register, BT Wholesale Hosted Communications (WHC) Express now provides a digital phone line for small businesses and a Broadband One package (full-fibre speeds up to 1Gbps). These may be a way to help BT’s resellers and integrators to tempt businesses to switch now to BT rather than wait a little longer and look around.

In July, while BT-owned Openreach was ramping up the urgency by asking customers to audit their systems for devices that use the PSTN, it also offered a ‘Call Waiting List’.  This is an online sign-up form for Openreach’s newsletter that also asks who provides the phone line(s) and offers an opt-in to share personal details with their “trusted third-parties” in relation to “digital products and services”.  While BT and the companies it owns have a genuine interest in making businesses aware that they need to prepare for the switch-over, they may also help by letting businesses know that there plenty of other providers of VoIP solutions.

What Are The Alternatives?

The old PTSN copper wires are essentially being replaced by a fibre network. With the switch-off of the old PSTN and ISD, as things look now, the main alternatives for businesses are:

SIP (Session Initiation Protocol), which uses virtual, cloud-based phone lines rather than physical lines. This may be more suitable for businesses with an on-premises phone system. Many existing phone systems are already compatible with SIP. Hosted VoIP/ a Hosted IP phone system may suit businesses that don’t want to commit or retain an on-premises phone system.  As this option uses the business’s internet lines, it essentially means that the business rents a phone system.

What Does This Mean For Your Business?

Although the move is industry-led, there is little doubt that analogue (and old, expensive to maintain) copper wire phone systems will not be able to provide the scope, flexibility, speed, capacity, and economies of the digital alternatives as businesses now rely heavily on the Internet.

Provided that there is adequate information and support given by the regulator and BT Openreach, and coordination among communications service providers (CSPs), and adequate advice and help for downstream providers, then change should be manageable, and disruption should be minimised. Obviously, very careful consideration, help, and planning need to be given to those sectors and organisations, many of which are vital to UK business and infrastructure, that still rely on some attributes of the PSTN that may not yet look as though they can be fully replicated in VoIP-based platforms.

One other important message here is that, although it’s a big change, and some test-areas will be switched-over first, the switch-over will generally be spread over four years. Although it’s important to audit systems and be prepared, businesses will have time to shop around and choose from a number of different providers and solutions rather than feeling as if they have to opt for the first offers from the big providers straight away.

About Us 

J700 Group are a Lancashire-based, family-run, professional and responsive, Managed Solutions Provider helping Businesses, the Education Sector, and the Healthcare Sector to utilise Innovative IT Consultancy Services, Cloud Solutions, Cyber Security, Microsoft 365, Telecoms, 3CX, Web Design and SEO solutions to propel their organisation to the next level and beyond. 

As an experienced IT Support Provider, helping businesses across Lancashire & Manchester, if you need any assistance with your IT including IT Hardware, a Disaster Recovery Policy or Managed Backup Solutions; Contact us today to see how we can help your business.

Enjoyed this? Read more from J700 Group Limited

Latest news

1

Three weekly domestic waste collection considered in plans Waste recycling Blackpool

Three weekly domestic waste collection considered in plans

01 Jul 2025

2

Graham Engineering confirms acquisition to a2e Industries Graham Engineering

Graham Engineering confirms acquisition to a2e Industries

01 Jul 2025

3

Training 2000 celebrate 'Good' rating by Ofsted Training 2000

Training 2000 celebrate 'Good' rating by Ofsted

01 Jul 2025

4

Fox Group acquires J Fisher and Sons Colin Fisher, Paul Fox CEO and Gary Fisher.

Fox Group acquires J Fisher and Sons

01 Jul 2025

5

Beever and Struthers strengthen leadership team with new partners Dean Curtis and Joe Diston

Beever and Struthers strengthen leadership team with new partners

01 Jul 2025

Background image for hub sign up block

LBV Hub

Leverage Lancashire Business View platforms

Post your news
Post your events
Post your offers
Build your network
Improve your SEO
Gain coverage in the magazine
Sign-up
Events
LBV123 July/August Launch Event
Lancashire Business View magazine launch
Networking
16 Jul 2025

LBV123 July/August Launch Event

Burnley

08:30 - 10:30

Lancashire Built Environment Conference 2025
BEC 315 X 315 Px
Networking
25 Sep 2025

Lancashire Built Environment Conference 2025

Blackpool Football Club, Blackpool, FY1 6HX

08:30 - 13:00

CMI Level 5 Management and Leadership Course
UCLanAerialCampus.jpg.jpg
LBV Hub Seminars
21 Feb 2025 - 21 Feb 2026

CMI Level 5 Management and Leadership Course

Preston Campus, Preston , PR1 2HE

09:00 - 17:00

CMI Level 5 Project Management Course
UCLanAerialCampus.jpg.jpg
LBV Hub Seminars
21 Feb 2025 - 21 Feb 2026

CMI Level 5 Project Management Course

Preston Campus, Preston, PR1 2HE

08:00 - 17:00

Business Bike Club – July
Chamber Logo1.png.png
LBV Hub Networking
01 Jul 2025 - 01 Jul 2025

Business Bike Club – July

Various, Lancaster, LA

08:00 - 09:30

Chamber Breakfast Networking – July
Chamber Logo1.png.png
LBV Hub Networking
02 Jul 2025 - 02 Jul 2025

Chamber Breakfast Networking – July

St John's Hospice, Slyne Road, Lancaster, LA2 6ST

08:00 - 10:00

The Marketing Metrics that Matter – July 4
LBV Hub Seminars
04 Jul 2025 - 04 Jul 2025

The Marketing Metrics that Matter – July 4

Door4 Office, Burnley Wharf, Burnley, BB11 1JG

08:30 - 11:00

Tri-Site Survey Equipment Showcase
unnamed (2).jpg.jpg
LBV Hub Seminars
09 Jul 2025 - 09 Jul 2025

Tri-Site Survey Equipment Showcase

Crow Wood Hotel, Burnley, BB12 0RT

09:30 - 16:00

Chamber Summer BBQ
LBV Hub Social
17 Jul 2025 - 17 Jul 2025

Chamber Summer BBQ

The Borough, Dalton Square, Lancaster, LA1 1PP

17:30 - 20:00

Preston Tech Connection: Web3 is Dead. Or is It?
July Longer Banner.jpg.jpg
LBV Hub Networking
29 Jul 2025 - 29 Jul 2025

Preston Tech Connection: Web3 is Dead. Or is It?

Society1, Coworking Space, Preston, PR1 3LT

18:00 - 19:30

Preston Freelancer Meet-Up: July
Longer July Banner.jpg.jpg
LBV Hub Networking
31 Jul 2025 - 31 Jul 2025

Preston Freelancer Meet-Up: July

Society1, Coworking Space, Preston, PR1 3LT

10:00 - 11:30

Cumbria Business Expo 2025
https---cdn.evbuc.com-images-880461633-4862066883-1-original.20241022-110415.jpeg.jpg
LBV Hub Exhibitions
19 Sep 2025 - 19 Sep 2025

Cumbria Business Expo 2025

Carlisle Racecourse, Carlisle, CA2 4TS

09:00 - 15:00

Advertise with us

Reaching 50,000 members, our print, digital and event platforms offer a fantastic way to raise your business profile and help you grow.

Find out more LBV122 Online Graphic
Subscribe now

Weekly news bulletin