PSTN vs ISDN – What's the difference?
It’s not just PSTN being switched off; ISDN (Integrated Services Digital Network) is also being replaced, too. Many businesses will likely have a mix of both communication systems, so you can learn what you need to do for the ISDN switch off here.
ISDN was introduced in the late 1980s as a telecommunications technology that digitally transmitted voice, video and data over the PSTN analogue lines. This was beneficial for the time, as it offered faster speeds, better quality and enabled businesses to use multiple channels, but developments with VoIP technology have become more prevalent. ISDN acts as the bridge to connect the old with the new, but even now, the technology is showing its age and typically requires costly maintenance just like PSTN.
In short, think of ISDN as the successor of PSTN, and IP-based systems as the current technology used. Much like how we started out with classic rotary telephones, then developed the first mobile telephones, which have now developed into smartphone technology, offering far greater capabilities than the systems used back in the early 20th century.
How to audit your site for PSTN dependencies
With the PSTN switch off, it’s good to know what services and systems in your premises still rely on copper-based phone lines. Here’s a step-by-step approach to auditing your premises for PSTN systems:
1. List all phone lines in use
Begin by documenting every active landline number across your premises, including both voice and data lines. Don’t forget remote or lesser-used locations.
2. Identify connected devices
PSTN supports more than just phone calls, so you need to also check devices like alarms, fax machines, door entry systems, lift emergency phones, EPOS systems and payment terminals. Make a note of anything physically connected to a phone socket.
3. Check contracts and equipment age
Next, review your service contracts and equipment warranties. Your older hardware may be PSTN-dependent and incompatible with IP-based systems. Reviewing this will highlight what upgrades are needed before the switch off.
4. Consult with vendors
Speak with your alarm, lift, security and EPOS providers, and ask whether the systems are PSTN-reliant. They should recommend the best upgrades and digital-ready solutions.
For a quick head start, Birmingham Telecom can provide a free review of your current PSTN systems and guide you through the best options, including business line rental, and safeguard your business well in advance before the big switch off.
