Setting up Fax on Telnyx Mission Control portal can be done with just a few clicks. 

Setting up Outbound Fax

Create a Connection (you can skip this step if you've already created a connection that will be used for receiving Fax traffic)

  1. Visit the CONNECTIONS page via the navigation menu on the left
  2. Click the ADD CONNECTION button near the top right
  3. Select your authentication method (User/Pass or IP Address) and input your information
  4. Click CREATE

Create an Outbound Profile

  1. Visit the OUTBOUND page via the navigation menu on the left
  2. Click the +ADD OUTBOUND PROFILE button near the top right
  3. Select the connection you'd like to use for Fax traffic via the connection drop-down
  4. Select "Conversational" for Traffic Type and "US/Can" for Service Plan
  5. Click ADD

You are now all setup for Outbound Fax with Telnyx. By default, Telnyx will send a T38 re-INVITE message once FAX tone is detected. If you wish to change this behavior, edit your connection by clicking on Outbound and clicking on the menu for "T.38 Re-invite Initiated By" a) Telnyx (Default), b) Customer or c) Disabled (enables G711 FAX calls)

Setting up Inbound Fax

Create a Connection (you can skip this step if you've already created a connection that will be used for sending Fax traffic)

  1. Visit the CONNECTIONS page via the navigation menu on the left
  2. Click the ADD CONNECTION button near the top right
  3. Select your authentication method (User/Pass or IP Address) and input your information
  4. Click CREATE

Purchase a number that you would like to use for receiving Faxes (you can skip this step if you've already purchased the number you'd like to use)

  1. Visit the NUMBERS page via the navigation menu on the left
  2. Go to the SEARCH NUMBERS tab and submit a search
  3. There are multiple "Search Types" available that will enable you to search by Region, Are Code, Prefix, and more.Click +ADD TO CART to select the number(s) you would like and add it to your shopping cartClick on the Shopping Cart button on the right side of the page and checkout to purchase your number(s)

Assign a Connection to your Number(s)

  1. Visit the NUMBERS page via the navigation menu on the left
  2. Go to the MY NUMBERS tab. You should see your purchased number listed 
  3. Click the Connection drop-down next to the number you'd like to use for fax
  4. Select the connection you created for receiving Faxes

You are now all setup to receive Inbound Fax with Telnyx. By default, Telnyx expects the customer to send a T38 re-INVITE. If no re-INVITE is received, the FAX call will continue with G711 codec. Note: Unchecking "Enable T38 FAX gateway" option under Numbers page forces Telnyx to not accept a T38 reinvite.

Enable T.38 Re-Invites. 

  1. Visit the NUMBERS page via the navigation menu on the left
  2. Go to the MY NUMBERS tab. Find your number
  3. Select Advanced Options button (gear icon) next to the number
  4. Click on "Expert Configuration" to show additional options
  5. Check the "Enable T.38 Fax Gateway" option

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