Should your business consider switching to SIP?

As ISDN begins its end, what will this mean for business voice?

With the Australian ISDN drawing to a close, why should companies look to SIP as the best strategy for implementing business voice?

It might seem a long way off, but the eventual shut down of the Australian ISDN (Integrated Services Digital Network) will be here sooner than you think. By 2022 Telstra will discontinue supporting its ISDN products due to the supporting technologies and platforms nearing the end of their lifetime.


As the NBN continues to roll out across the country, what should businesses be doing in preparation for the switch?



The clock is definitely ticking for companies relying on ISDN to find an alternative solution.

What services will be switched off?


ISDN is a digital network technology that carries voice and data services over the public switched telephone network.


Telstra will cease the sale of ISDN2, ISDN2 Enhanced, ISDN10/20/30, DDS Fastway, Megalink and Frame Relay products by 30th June 2018, with a final disconnection date expected by 2022 which is when the products will no longer exist.


While businesses using these 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 exists and its cheaper and more efficient than ISDN.  SIP, or Session Initiated Protocol is the future of business voice.



With ISDN nearing its end, what will this mean for business voice?With ISDN nearing its end, what will this mean for your phone system?


How to make the move from ISDN to SIP


A SIP Trunk is the digital equivalent of a traditional phone line.  A SIP Trunk needs to connect to a PBX – a device that provides the brains behind the phone system that enables multiple users to share lines. You will need to decide whether to host your PBX in the cloud or at your premises. Getting the assistance of a SIP provider will help simplify this process.



SIP offers a number of key advantages over ISDN

The advantages of SIP over ISDN


SIP offers a number of key advantages over ISDN, which we’ve covered in greater detail in a previous article. However, for a quick breakdown we’ve listed a few of them here:


  1. Scalability: ISDN channels are usually limited in number whereas SIP is deployed across a business’s existing WAN, meaning channels can be added or removed as needed
  2. Portability: With SIP, phone numbers aren’t tied to a physical location, which is great for business continuity.
  3. Quality: SIP can be delivered over high bandwidth connections (eg. Fibre or Copper), allowing users to make and receive high quality voice calls. SIP also comes with failover options unavailable on ISDN.
  4. Price: Finally, what makes SIP the easy choice over ISDN is SIP is the more cost-effective solution, up to 40 per cent cheaper than ISDN lines, according to Vitesse Media. A SIP call remains within a business’ MPLS network, avoiding call charges by the telecommunications provider.


With the imminent cessation of ISDN, switching to sophisticated SIP technology should be a business priority.


At Telarus, our solutions unite voice, data and security through a single, end-to-end service provider. We can help organisations of any size achieve a higher level of productivity.


To find out more, reach out to a member of the Telarus team today.

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