The Death of ISDN - Carden Telecoms

The Death of ISDN – Are You Ready?

From 2020 BT Wholesale will not permit allow the purchase of new ISDN and PSTN circuits. This is the first step toward an eventual shut down of these circuits in 2025. This will force organisations currently utilising ISDN to move entirely to VoIP telecoms solutions before 2025. At Carden Telecoms we are encouraging our customers to stay ahead curve by making the switch to VoIP today.

What are ISDN and PSTN?

Integrated Services Digital Network (ISDN) and Public Switched Telephone Network (PSTN) are the circuits used by most of us when we speak on the phone. PSTN is the older of the two and is functionally very similar to the original phone circuits of the early 20th century – with analogue voice transmitted over switched circuit copper lines.

ISDN was one of the first widespread attempts to replace PSTN, with data and voice transmitted over digital lines. While impressive in its day, fibre broadband, LTE and 5G have quickly outpaced the capabilities of both of these methods, especially for more advanced telecoms functions like video calling.

So what come next?

By 2025 all public and commercial PSTN and ISDN circuits will be usurped by VoIP (voice over internet protocol) systems. These systems can be run either on dedicated onsite servers or hosted remotely in the cloud.

Instead of running on ISDN or PSTN, on-premises VoIP systems will be run through SIP trunks – virtual phone lines running over your internet connection.

A hosted system is delivered through your existing internet connection and has no need for specialist hardware (other than phone handsets), engineers or dedicated phone lines.

You can find out more about these here:

Why is BT no longer providing ISDN and PSTN circuits?

Maintaining legacy telecoms networks is extremely expensive and BT is attempting to keep up with modern innovation while giving the public and companies time to prepare and adjust for the switch-off.

What should my business do?

Research VoIP

Across this site you will find details of various VoIP solutions for modern enterprise telecoms. The variant required will be different depending on the size and operations of your organisation. For example, a small company that is rapidly expanding would be best served by a scalable, cloud-hosted VoIP solution whereas large companies may be better served by moving their VoIP systems in-house.

Get in touch

Our account managers are experts in finding the right telecoms solution for each client. They have experience with a wide variety of businesses; from two person start-ups to multinational corporations, so speak to one today and let them guide you through your transition to a VoIP environment.

Call Carden Telecoms today for more infomation!

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