ISDN Decommission: Aussie businesses now at risk of comms blackout

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It’s been a long time coming, but in just a few short months, the ISDN will be switched off. With the clock seriously ticking, time’s running out for businesses to make the most advantageous migration plans. For any business failing to migrate, the stark reality of the ISDN decommission will be a complete communication blackout.

According to Telstra, the ISDN decommission will impact thousands of ISDN sites that are still using the old copper network for voice and data, as well as other services including:

  • EFTPOS or health-claim terminals
  • Security alarms and monitored fire alarms
  • Fax and teletypewriter devices
  • Lift emergency phones

How you handle the ISDN decommission and replace your current ISDN service largely depends on a number of factors, including your:

  • Business locations
  • Preferred provider, and
  • Selection of cloud or on-premises solutions for your data and voice.


The way ahead

The preferred option for many of our clients is SIP trunking. SIP, or Session Initiation Protocol, uses Voice over IP (VoIP) to bring together voice and data services. A SIP trunk connects to your existing PBX (if it is SIP trunk enabled), and provides crystal-clear audio, voice encryption and mobile-call rerouting.

Voice calls simply become Internet data traffic like emails, and video streaming. You can keep your existing phone number and decide which number displays on a call-by-call basis. 

Businesses looking for a new PBX solution will have to decide whether to host their systems via PBX in the cloud, or on-premises.


ISDN Cut Off


The benefits of SIP

Early adopters of SIP trunking were attracted to the potential for cost savings, flexibility and scalability of their communications infrastructure:


Cost savings

Multiple individual ISDN lines can be replaced by a single IP link, eliminating the cost of line rental. Internal calls that remain within the business’s network avoid charges from telecommunications providers, helping reduce voice call costs.



Provisioning and setting up new lines to meet business needs can be done in minutes with no physical set-up required, ensuring you have the right communication applications where and when you need them.  



Instead of purchasing lines in blocks, the flexibility of SIP trunking means that you can purchase lines as and when required, and you can increase or decrease them to match seasonal needs.


SIP trunking and unified communications

SIP trunking is also a significant enabler for businesses seeking to adopt UC strategies to unify all of your communications needs. SIP trunking enables businesses to build an IP-based UC system, bringing together voice, data, instant messaging and other cloud-based applications, ensuring real-time and other communication can be managed on the one platform.


Take advantage of the ISDN decommission

Rather than seeing the upcoming ISDN decommission as a disruption to your business, make the most of it by switching to technologies like SIP trunking. imei can help you determine the right bandwidth for your business’ needs, ensure the network you choose is fit for purpose, and order the ideal number of SIP trunks for your business in advance.


Consider switching to SIP

To find out if SIP is right for your business, download our handy planning tool and then give us a call. We can help review your existing set-up and usage patterns – and find an optimal network strategy for your business.


ISDN Cut Off

Topics: Management Unified Communications Connectivity