Long Live Telecommunications


Today we are faced with a unique challenge in business. Telstra, who currently operates approximately 80% of the business market, is turning off ISDN (Integrated Services Digital Network), a business voice network.  ISDN comes in two forms, the first being ISDN 2 or BRI (Basic Rate Interface), and the second being PRI (Primary Rate Interface). The first is a service over copper and the second is a service over fibre. These services have been the main stay for business telecommunications for the last 20 years, but are now coming to an end. By the end of 2023 it will no longer be supported by any networks. The mainstream replacement product is SIP (Session Initiation Protocol), which is the engine room for VOIP (Voice Over Internet Protocol).

ISDN is a digital network technology that carries Voice and data services over the public switched network

ISDN is a digital network technology that carries voice and data services over the public switched telephone network. This method requires a physical connection per location, dedicated to telephony traffic. With the rise of Voice over IP solutions telephony traffic can move to more versatile data network connections, enabling versatility and redundancy not available through traditional telephony.

Spurred on by the continued roll-out of the NBN, Telstra ceased sale of ISDN2, ISDN2 Enhanced, ISDN10/20/30, DDS Fastway, Megalink and Frame Relay products from 30th June 2018, with a final disconnection date expected by 2022 which is when the products will no longer exist.

  • 1st January 2018 – New ISDN services became unavailable for customers who did not already have ISDN in place.

  • 30th June 2018 – Full cease sale on new or additional ISDN services came into effect for all customers. No new ISDN services are available.

  • 30th September 2019 – Disconnection will commence for existing ISDN connections

  • By 2022 – All ISDN connections will be disconnected and the full network will be decommissioned.