Faulty & Damaged BizPhone ATA

When the same issue is affecting multiple handsets, it is unlikely that a single device is faulty. Please see our BizPhone troubleshooting guides on iiHelp for more information.


  1. If relevant, please see if our troubleshooting guides for Can’t Make/Receive Calls, No Registration, Call Dropouts or Poor Audio Quality were able to resolve your handset issue.
  2. Restart the ATA by disconnecting its power cable for 10 seconds, then reconnect.
    BizPhone ATA power ports
  3. Ensure the Ethernet, power and phone cables are connected securely to your ATA.
    BizPhone ATA plugin diagram
  4. Plug the ATA into an alternative electrical socket and check if the issue persists.
  5. Connect the ATA to your modem using an alternative Ethernet cable and check if the issue persists.
  6. If the issue persists, make a note of the Serial number and MAC address on your ATA's barcode sticker:
    BizPhone ATA Serial and MAC
  7. Please email biz-support@iinet.net.au with the following details:

    Contact Number
    Company Name and Delivery Address
    ATA Serial number and MAC address
    Hardware Model and BizPhone number associated with it
    Replacement reason