Is it Time to Migrate From ISDN to SIP?

You might be aware that the switch-off date for ISDN (Integrated Services Digital Network) lines has been set by BT for December 2025. Although you can still purchase ISDN lines until September 2023, if your business telephony system is due for an upgrade, then it makes sense to consider new technology.

Why is the ISDN switch-off happening?

ISDN technology is being made redundant by the advantages offered by cloud telephony, which has developed rapidly with the introduction of superfast fibre broadband. The future for business communications lies in Internet Protocol (IP) services, which are cheaper to maintain and offer much greater scope and flexibility than the older ISDN systems.

What are the alternatives to ISDN?

SIP (Session Initiation Protocol) Trunking is a form of VoIP (Voice over Internet Protocol) which uses a dedicated IP connection.  This can be a leased line or assured broadband.  SIP Trunks handle all forms of communication, from voice calls to video conferencing, instant messaging, and screen sharing.

There are many benefits for a business or organisation to have communication technologies integrated and streamlined by SIP.  It can reduce overheads and make remote working easier by facilitating better collaboration. Unlike Skype or other streaming services, SIP Trunks use only dedicated IP connections, so there is no compromise on quality.

How do you migrate to SIP?

It is more straightforward than you might think. You will be able to port and retain your existing numbers. However, it is important to define your requirements before choosing a SIP provider. Do an audit of your current system to check how many lines you will need, and if you need extra bandwidth. The migration can be done over a few weeks, or in phases.

For more advice on migrating from ISDN to SIP, talk to a business communications provider today.