ISDN End of Life

by | Jun 3, 2017 | Marketing

NECALL is advising customers to prepare for the shutdown of the ISDN carrier services that are connected to your telephone systems well before the anticipated disconnection date.

Telstra has ceased the sale of ISDN2, ISDN2 Enhanced, ISDN10/20/30, DDS Fastway, Megalink and Frame Relay products, with a final disconnection date expected by 2022 which is when the products will no longer exist.



  • 30th June 2018  – Cease sale on new or additional ISDN services for all customers, no new services will be available.
  • June 2019 – Disconnection will commence for existing ISDN connections.
  • By 2022  – All ISDN connections will be disconnected and the full network will be decommissioned.

While businesses using these ISDN products can expect plenty of early warning leading up to the exit, the clock is definitely ticking for companies relying on ISDN to find an alternative solution. Thankfully, a solution known as SIP Carrier Services (SIP trunks) exists that is more scalable, flexible and widely available through the NBN.

NECALL can help you avoid the problems in migrating your business ISDN services to VoIP / SIP on the NBN, EFM or Fibre network.

Our migration process covers all these important steps:

  • Check all services that may be affected;  for example, fire and security have special needs on the NBN. Decide which services need to be migrated and which services can be cancelled.
  • Select the appropriate IP carrier/link with the correct bandwidth for your business needs.
  • VoIP and SIP Trunk services will run over the internet.
  • Dimension the correct amount of SIP trunks (lines for incoming and outgoing calls) for your business.
  • Have your existing phone numbers ported or forwarded onto the new SIP Trunk services.

The end of ISDN is nothing to be concerned about; with VoIP (Voice over Internet Protocol) and SIP trunks this is now a very reliable solution and offers more flexibility and features than the old technology of PSTN and ISDN services.

We have found that most companies can save costs by using VoIP / SIP trunks. However, there are some pitfalls to avoid, so it is best to get some professional advice.

If you would like NECALL to put a migration plan together for your company please call us on 08 9455 3122 or email


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