Mango Voice
2 min read·Last updated: 03.14.2025

Fax Detect switchboard object

Use the Fax Detect object to listen for an incoming fax tone and route faxes to your fax service while still allowing the same number to receive regular calls.

The Fax Detect switchboard object, a gray rounded node labeled FAX DETECT with a Drop connector on the left, a Drag connector on the right, and a dropdown showing 500 - Virtual Fax

Options

Fax Detect listens to the line for a fax tone and transfers it to the fax service when a fax tone from the calling party is detected.

Use cases

Note: This switchboard object is deprecated. We recommend customers use a dedicated fax number.

  • Fax Detect allows one number to receive both calls and faxes.

Pointers

The fax tone comes in every 4–5 seconds, so it might not detect the fax tone before ringing your phone. This may seem like you are receiving ghost calls, but Mango is detecting faxes and stopping the phone from ringing. It is recommended to make sure there is a larger delay with a sound clip after the Fax Detect object, or a 5-second wait.

Set up your Virtual Fax

First, set up your Virtual Fax extension by following the Mango Voice Virtual Fax setup guide. Once your Virtual Fax is ready, configure it in your switchboard:

  1. Right after Start, create the Fax Detect object and select your recently created Virtual Fax.
  2. Add a 5-second Wait to allow enough time for the Fax Detect to do its magic.
  3. Connect the Wait to your normal call flow and you're good to go!
A switchboard call flow showing the Start object connected to a Fax Detect node set to 500 - Virtual Fax, which connects to a Wait node with a duration of 5 seconds and Ring During Wait enabled

The behind the scenes

When you receive a fax, our system converts it into a PDF that can be downloaded from your email or from your Mango Portal.

The email can be changed, or additional emails can be added, by going into your Virtual Fax extension and following this format:

email1@test.com,email2@test.com,email3@test.com

How do I get help?

Stay in the loop.

New posts, product updates, and insights for healthcare practices, delivered to your inbox.