Custom Caller ID Not Presenting to Telstra Numbers

Support Centre Troubleshooting Articles Custom Caller ID Not Presenting to Telstra Numbers

Telstra have advised that, due to technical limitations, they have paused implementation of the below. They have not provided an ETA on when this limiting will take effect.

As part of Telstra's response to new telecommunications industry regulations around reducing scam calls, Telstra are now preventing calls to their network originating from MaxoTel where the phone number presented is one that resides on Telstra's network.

As a practical example, if you have a service from Telstra with the phone number 0712345678, and you have added this phone number to your custom Caller ID for your MaxoTel service, calls to Telstra services trying to present 0712345678 will show either no caller ID, or be rejected by Telstra's network.

Note that this only impacts you if both of the following are true:

  1. You have added a Telstra phone number as a custom Caller ID in your MaxoTel account
  2. You are presenting this Caller ID on outbound calls to Telstra numbers

This will not affect any Telstra phone numbers that you have ported in to our network - these can be set as Caller ID without issue.

Please note that, at this stage, Telstra are still allowing forwarded calls to show the original caller's phone number. For example, if a Telstra mobile 0412345678 calls a number on your MaxoTel service and it is then forwarded out to another Telstra mobile or landline without being answered by a team member, the original caller's number (0412345678) will be correctly displayed.

To ensure your service is not impacted by these changes, there are two options available to you:

Port Your Telstra Number to MaxoTel

Number porting is the process of moving your phone number from Telstra directly to your MaxoTel service. Once the port has complete, your phone number resides on MaxoTel's network and can be routed in the same way as any numbers sourced from our stock pool.

To begin the process of porting your phone number over, please login to and locate Number Porting under Other Services. Fill out the form with the details Telstra have on file for your service, validate the phone number, then submit the request.

For further information on porting your number/s, please see Number Porting FAQ

Change Your Caller ID

Should you not wish to port your phone numbers, or you're in the process but it hasn't yet completed, you can instead select a phone number already on your MaxoTel account to use as your Caller ID.

If you don't currently have any phone numbers, you can order a new number by selecting Number Routing, then Add a New Number. For more information, please see Portal Guide - Number Routing

Caller ID can be set on an account-wide default or per extension basis. To set your account-wide default Caller ID, click on your username at the top right of the Portal, then choose the desired Caller ID from the dropdown. To set your Caller ID on a per-extension basis, choose the PBX Extensions or SIP Trunks section (depending on your plan), edit the extension you wish to change, then choose the desired Caller ID from the Caller ID dropdown.

Further Information

The ACMA and Communications Alliance introduced additional regulations (Reducing Scam Calls) recently in an effort to identify and block scam calls. You can find the code at the Communications Alliance website

Telstra's approach is designed to combat 'spoofed numbers', where a scammer sets their Caller ID to a number different to their own in an attempt to convince potential victims to answer their calls, and of their legitimacy. MaxoTel combats spoofed numbers by requiring validation on any custom Caller IDs added to your service.