ISDN (Integrated Services Digital Network) is a digital network technology that delivers voice and data as a digital signal over standard telephone lines. ISDN services are carried across the existing copper lines and will likely be disconnected when the NBN service is rolled out in your area.
Disconnections are expected to commence from June 2019 which will be in line with NBN Co’s rollout region disconnection timeframe and will continue until June 2021. Businesses will be disconnected from their old services 18 months after their area is declared NBN-ready. This allows enough time for businesses to organise alternative solutions for their phone systems. In the meantime, ISDN product sales and services will slowly be phased out over the next few months.
Starting from January 31 this year, ISDN services will stop being available for sale to new customers. By the end of June 2018, ISDN services will no longer be sold to existing customers. However, existing customers will still be able to make configuration, software and record changes to their service during the period leading up to the final disconnection. The final exit date for ISDN is expected to be sometime in 2022.