Faxing over Ooma is highly dependent on the quality of your Internet connection. Faxing technology was developed to work over regular phone lines, which do not experience the same amount of delay and data loss that Internet networks do today. Although it is already possible to send and receive faxes with Ooma, we’re always looking into new ways to improve the reliability with faxing with the Ooma system. In the meantime, ensuring that your setup is configured in the optimal way is your surest way of successfully sending and receiving faxes. If you are having difficulties sending or receiving faxes, please try the following troubleshooting steps:

  • Make sure your fax machine is getting a dial tone, and troubleshoot the HT812/HT814 ATA, Base Station, or Linx device’s connection if it is not
  • Check that you have enabled Fax Mode for the correct phone port if you’re using an HT812/HT814 ATA device
  • Ensure that your Ooma device is hooked up directly to your modem, ahead of your router (Setup Option A in your Quick Start Guide)
  • Disable “ECM” (i.e., “Error Correction Mode”) on your fax machine
  • Decrease the transmission or baud rate
  • Reduce the number of pages that are sent per fax
  • Decrease the desired image quality of the fax
  • Discontinue any large file downloads (for receiving faxes) or uploads (for sending faxes)