Acting now will ensure you are taking advantage of the benefits of SIP Trunking plus avoiding future disconnections that may disrupt your business.

Thankfully, a solution exists that is more cost effective and time efficient than ISDN.

We make it simple to do business by connecting you whenever and wherever you are

Future-proof your business, reduce your costs and simplify your voice
services by switching to ADOP Communications SIP


Connect, communicate and collaborate

ADOP Communications SIP Trunks provide a secure, resilient and feature rich PSTN/ISDN replacement solution via a direct VoIP based solution.

SIP Trunking (SIP) is ADOP Communications Voice over Internet Protocol based solution that connects a customer’s phone system to the local Public Switched Telephone Network (PSTN).

ADOP Communications SIP Trunks give your business the latest in voice calling technology by utilising your business grade Internet connection through our premium network infrastructure. It is a feature rich solution; offering telephone numbers, incoming call capability, and outbound calling capability, alongside being reliable, cost effective, flexible and scalable.



SIP Trunks are digital equivalent of a phone line. A SIP Trunk replaces a traditional phone line, such as ISDN services and enables you to make and receive voice calls leveraging our carrier grade infrastructure.


  • Lower cost of access

  • Aggressive call rates

  • Easy to manage

  • Hardware agnostic

  • Re-utilise existing infrastructure

  • Scalable Trunks, 1 to 1000 channels

  • Independence of access network

  • Disaster Recovery options

  • Local Australian support

  • Instant provisioning

  • Tier 1 infrastructure


If you have an ISDN line, it is important that you know that all ISDN lines
will be gradually disconnected by 2020 as per the schedule.

Full cease sale on new or additional ISDN services for all customers

Ordering a new ISDN service will no longer be available. Customers will still be able to make configuration, software and record changes to existing services.

Disconnection will commence for existing ISDN connections.

Starting from June 2019, existing ISDN services will start to be disconnected. This will be occurring in a phased approach and will follow NBN Co’s rollout region disconnection timeframe.

All ISDN connections and networks will be disconnected

The government has announced that all ISDN connections will be disconnected, and the entire ISDN network will be decommissioned by 2020.