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How to configure an Elastix Version 5 Credentials Trunkhow-to-configure-an-elastix-version-5-credentials-trunk

How to configure an Elastix Credentials Trunk


3CXTelnyx Developers is a high-performance turnkey PBX that’s easy to install and manage. Powered by 3CX you get a complete unified communications solution with softphones included for Android, iOS, Windows and Mac as well as a web-client. Supported IP Phones, Trunks and gateways are all automatically configured with inbuilt templates. You also get integrated WebRTC video conferencing for free. Available on-premise on Windows, Linux, Raspberry Pi or in the Cloud.

You'll need to have created a credentials based connection on your Telnyx Mission Control Portal account, assigned this connection to a DID and outbound profile in order to make and receive calls.



Elastix 5 is available to download from hereTelnyx Developers.


For instructions on installation steps, please see Elastix installation guide hereTelnyx Developers.

Please note down any user and password you've created which will be used for login purposes at a later stage.

Once the installation has finished, you'll be prompted to choose either running the tool from the web browser or from the command line. We recommend the web browser. There is a URL provided which you will need to use to access the graphical user interface in order to configure Elastix 5.


Video Walkthrough

Coming soon! This walkthrough will demonstrate setting up a Credential based connection with Elastix 5. We'll also show you how to assign this connection to a newly purchased DID which will allow you to receive inbound calls. Then we'll walk you through how to assign the connection to an outbound profile such that you can make outbound calls!

Configuring Your Telnyx Mission Control Portalconfiguring-your-telnyx-mission-control-portal

For step by step instructions on each of the requirements on the Telnyx Mission Control Portal, please follow this guide.

Once you've configured your Telnyx account, you can now proceed to setup Elastix following the guide below.

Elastix 5 Setup Guideelastix-5-setup-guide


You are now all set on the Mission Control Portal side and are ready to configure your Telnyx trunk within your Elastix 5 system.

As Elastix is powered by 3CX, you'll need to acquire a license key to try it outTelnyx Developers.

Once you've acquired the key, proceed to creating a new install and click next.


IP Address

  1. 1You're public IP address will automaticall be detected next and you can choose to either go with the one that was detected or enter an IP address in manually. Once you've done this, click next.
  2. 2Choose whether your IP address is static or dynamic. Click next.


Select Ports

  1. 3Select the ports required for 3CX Management console. They automatically populate default values for you but you can choose your own.


Network Adapter

  1. 4Proceed to select the default network adapter.


FQDN and Certificates

  1. 5Your FQDN and certificates will now be generated.


Specify Extension Length

  1. 6Select how many digits your extensions should have.


Specify an Admin Email

  1. 7Enter an Email for important system notifications.


Configure Country and Time Zone

  1. 8Select Country and Time Zone.


Specify a Default Operator Extension

  1. 9Create an Operator Extension.


Security - Confirm Countries Call Can Be Made To

  1. 10As an additional security measure, you can specify to which countries calls can be made.


Select a Language

  1. 11Select your preferred language. The last sub section is registration and you should fill out your personal details here.


At this point the PBX basic settings are now fully configured and you'll be shown a congratulations page upon successfully completing the steps. Make sure you note the details that are provided but a copy of the details are also sent to the admin email you specified on a previous step.

Use the FQDN or your public IP address URL in order to access the PBX interface. If the PBX is on your local LAN, and your router has a firewall, ensure to apply port forwarding to the ports you specified in step 3 - otherwise the interface may not resolve for you.

Elastix PBX CONFIGURATIONelastix-pbx-configuration

Login and Dashboard

Login with the username and password you created.


You'll be brought the the dashboard now.


Confirm Your Network Settings

  • Go to "Settings" -> "Network"
  • "Ports" Tab: make sure your "SIP Port" is set to 5060.
  • "Public IP" Tab: double check your Public IP is correct and that you have selected the proper Network card Interface.
  • Settings --> Click on "Network Settings" --> Public IP tab --> Section : "External IP Configuration".
  • NOTE: Please make sure that connection IP on the portal and Static Public IP is same. You can also use the FQDN for inbound calls and the IP for outbound calls.

Create Telnyx SIP Trunk

  1. 1Click on "SIP Trunks" from the navigation menu on the left.
  2. 2Click "+ Add SIP Trunk" near the top of the screen.
  3. 3A new pop up will be opened. You need to enter/select all the required details :
    • Select Country: Worldwide
    • Select Provider in your Country: Telnyx LLC
    • Main Trunk No: Enter the number which you have purchased on your Telnyx Mission Control Portal


  1. 4After entering the details, Click on OK
  2. 5This will open the trunk configuration window:
    • Tabs
    • General
    • DIDs
    • Caller ID
    • Inbound Parameters
    • Outbound Parameters
  3. 6In the General tab, there are 3 sections to be explained in the following sections:
    • Trunk Details
    • Authentication
    • Route calls to
Trunk Details
  • Enter name of Trunk: Telnyx LLC
  • Registrar/Server/Gateway Hostname or IP: or
  • Outbound Proxy:
  • Number of SIM Calls: set your preferred amount of simultaneous calls


  • Type of Authentication: Register/Account based
  • Authentication ID (aka SIP user ID): You need to use the username from the connection which you have created in the Telnyx portal
  • Authentication Password: You need to use password from the connection which you have created in the Telnyx portal


Route calls to
  • Main Trunk number: By default number will be shown. You need cross verify with the number which you have purchased on telnyx porta
  • Destination for calls during the office hours: Based on your requirement
  • Destination for calls outside the office hours: Based on your requirement


  1. 7Select the "Options" tab
    • For "Require registration for:" select "Do not require".
    • Remove the "GSM-FR" from Assigned Codecs
    • Click "Apply"
  2. 8Select the "Outbound Parameters"
    • For "Contact : User Part" in the SIP Field column Select "Custom Field".
    • To allow private calling - "From: Display Name" and "From : User Part", select "Custom Field" but leave the Custom values blank.
    • Click "Apply".


  1. 9After entering all the details please click on “OK” which is on the top.
    • If all the fields are entered correctly the IP trunk will now be live. We can now proceed to our inbound and outbound rules.


Inbound Rules

  • Click on "Inbound Rules" from the navigation menu on the left.
  • Click on "+Add DID Rule" near the top of the screen.
  • There are 2 sections in this:
    • General
    • Route calls to


Route Calls to


Outbound Rules:

  • Click on "Outbound Rules" from the navigation menu on the left.
  • Click on "+Add" near the top of the screen.
  • There are 3 sections in this :
    • General
    • Apply this rule to these calls
    • Make outbound calls on

Rule Name : You can enter any preferred name


Apply this rule to these calls:
  • Calls to numbers starting with prefix : leave empty
  • Calls from extension(s) : You need to give the extension numbers
  • NOTE: ‘000’ is the extension used as an example.
  • Calls to Numbers with a length of : leave empty


Make outbound calls on:

We need to configure routes in this section. Configure up to 3 routes for calls. The second and third route will be used as backup. For each route, digits can be stripped or added. Strip Digits 0 on Route 1 and Strip Digits 1 digit for remaining 2 routes.


After completing the configuration, click "OK".

That's it, you've now completed the configuration of Elastix 5 IP-PBX Trunk and can now make and receive calls by using Telnyx as your SIP provider!

Additional Resourcesadditional-resources

Review our getting started guide to make sure your Telnyx Mission Control Portal account is setup correctly!

Check out Elastix's help sectionTelnyx Developers for extra support!

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