Connect to Cheap Telstra ISDN2 Rates

PBX Compatible

Largest ISDN Coverage

2 Lines per Service

Digital ISDN2 Phone Lines

ISDN2 is an ISDN (Integrated Services Digital Network) service that allows a business to gain all the advantages of digital phone lines without having to commit to more than 2 lines. ISDN2 enables you to conduct 2 concurrent telephone calls at the same time over the one PSTN line.


ISDN2 lines provide clear, high-quality telephone connections, and offer more call and messaging features than standard business lines. This type of service is ideally suited to businesses that require 2 to 4 telephone lines.

Key Features

  • Flexible Digital Technology
  • PBX Compatible
  • Extension In-Dial Numbers
  • Widest National ISDN Coverage
  • Two Concurrent Calls
  • Digital Features

Business ISDN2 Options

Connect to our Business ISDN2 plan offering cheap rates, or enquire if you're ready to take advantage of NBN Ready Business VoIP.


You can transfer your existing ISDN2 service to BusinessCom and take advantage of our cheap call rates; or request a new service to be installed. Lead times for same carrier transfers vary between 10 and 20 business days. New installations have a lead time of between 30 and 60 business days.  

BusinessCom can check what type of ISDN service is available at your business premises. We can also check if you can take advantage of more up to date technology like Business VoIP or Hosted PBX. Please call 1300 000 300 or CLICK HERE.


Alternative to ISDN2

With the rollout of NBN and other broadband infrastructure, an increasing number of businesses are starting to migrate their phone line services to Business VoIP and SIP Trunks. The business VoIP technology is gradually replacing traditional telephone lines like PSTN and ISDN.

Business VoIP utilises SIP Trunks which are essentially VoIP phone lines. There is no minimum or maximum number of SIP trunk channels that's required to connect business VoIP. And that means much greater level of functionality and flexibility. You can start with one SIP channel and add as your business grows. Provisioning of services is also much faster and there is no need for a technician to visit the business premises. SIP trunks are usually provisioned within 24 hours of receiving the application.

SIP trunks are fully portable and not restricted to individual premises. They don't require existing copper wiring and are much cheaper than traditional telephone linesThe majority of PBX systems installed in recent years are IP compatible. Provided your business is connected to a suitable broadband service, you can start using business VoIP without having to upgrade your existing phone system. To check if your business is VoIP ready, please call 1300 000 300 or CLICK HERE


Our Wholesale Partners