What is PSTN?
PSTN (Public Switched Telephone Network), sometimes referred to as traditional landline network, is a circuit-switched system that uses copper wires to transmit analog voice signals. PSTN lines have played a vital role in ensuring reliable voice communication for both residential and commercial users. While PSTN and ISDN lines have stood as the backbone of voice communication, rapid technological advancements have brought innovations and new solutions to the market – resulting in the decommissioning of PSTN services.
Are You Prepared for the PSTN Shut Off?
The decommissioning of PSTN will significantly impact businesses and consumers. A 2023 report by Gamma found that 48% of UK businesses surveyed were either unaware of the PSTN shut-off (29%) or were uninformed of the details (19%). The same report also found that of the UK businesses using PSTN and aware of the shut-off, 46% had not completed any activities towards a migration. It is crucial for businesses to understand the details of the PSTN shut-off, what it means for their existing systems, and the investments required to adapt. The report found that businesses currently use PSTN for customer support (69%), orders/bookings (59%), marketing/sales (50%), internal collaboration (48%), and logistics (47%).
It’s Time to Modernize
The driving force behind the decommissioning of PSTN is the shift towards IP-based networks. Internet Protocol (IP) networks offer a greater degree of flexibility, scalability, and cost-efficiency than the antiquated PSTN infrastructure. Moreover, IP-based networks facilitate the integration of voice, data, and video services into a singular network, simplifying communication and boosting productivity.
Moving from PSTN to Digital/IP Voice Services
As the decommissioning of the Public Switched Telephone Network (PSTN) approaches, businesses and organizations need to gear up for the shift to digital or IP voice solutions. This transition brings numerous benefits and opportunities for improved communication and efficiency.
Voice over Internet Protocol (VoIP)/IP telephony harnesses the power of the internet to transmit voice calls. Unlike traditional PSTN services, digital voice and IP voice services use data networks to transmit voice packets, resulting in cost savings, improved call quality, and advanced features.
Preparing for the shift from PSTN to digital voice requires a thorough assessment of the existing infrastructure and determining the compatibility of legacy devices and systems. Many legacy devices, such as analog phones, fax machines, and alarm systems, rely on PSTN analog connections and will be affected by the decommissioning. Businesses need to identify suitable replacements or solutions to ensure uninterrupted communication.
Get Started
NVT Phybridge offers a comprehensive range of solutions to replace outdated PSTN analog solutions. Innovative networking solutions, such as the PoLRE managed switches, enable businesses to easily migrate to digital and IP voice solutions without the need for costly infrastructure upgrades or re-cabling. Thousands of organizations and government agencies around the world have already seamlessly transition to IP telephony while preserving investments in existing LAN cabling.
NVT Phybridge Power over Ethernet Switches and Extenders
Enable IP Cameras, IP Phones, or Any IEEE-Compliant Device
All NVT Phybridge IP products are manufactured in North America and are TAA and NDAA compliant
A key component in building a robust backbone for IP telephony is Power over Ethernet (PoE) networking solutions. PoE technology simplifies the deployment of IP phones and other network devices by delivering both power and data through a single Ethernet cable. NVT Phybridge offers a wide selection of PoE switches and extenders, ensuring reliable and efficient power delivery to all network endpoints.
Book a meeting with one of our specialists to learn how we can support your transition to an IP voice solution without complexity, high LAN readiness costs, or business disruption.
Trusted by Leading Brands Worldwide
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
Feature Story: Chelsea Piers
Chelsea Piers uses NVT Phybridge PoE switches to deploy over 300 IP communication devices across its 28-acre waterfront sports village
Industry-Leading Power over Ethernet Solutions Enabling IP Devices
Speed, Reach & Power
NVT Phybridge PoE switches combine speed, reach, and power capabilities to support the most demanding IP and IoT devices.
![]()
Performance & Reliability
Deliver power and data with up to 6,000ft (1,830m) reach, 18-times farther than standard PoE switches.
PowerWISE® Technology
NVT Phybridge PoE switches come with hot-swappable power supplies, power-sharing for redundancy, power management features, and up to 50 Watts of power per port.
Cable Type
Our PoE switches enable IP and IoT devices using any new or existing Coax/UTP cabling infrastructure.
Performance Matters
See for yourself. Select and compare our CHARIoT Switches against the industry-leading Cisco Catalyst Switches and our competition.

















