Configuring a Bandwidth Global SIP Trunk

Step 1: Sign-Up and Trunk Creation

  1. Set up an account with Bandwidth and log in to the portal.
  2. Click on “Get Numbers” to purchase DIDs.
  3. Go to “Settings”, select “Voice URIs” and click on “New”. This will generate a URI that links the DIDs to 3CX.

Configure your Voice URI as “{E164}@(SIP domain)”.

Example: “{E164}@example.3cx.com”

You can also use the public IP of your 3CX (if static).

Example: “{E164}@1.1.1.1”

  1. Once the URI is generated, go to “Numbers”.
  2. Click on “My Numbers” from the dropdown box and select your number.
  3. Link your Voice URI to your number by clicking on “Basic” in the top right corner, expand “Voice URI'' and select your URI from the dropdown.
  4. Select “Voice” from the same menu.
  5. Choose the appropriate codecs and set DTMF value to RFC2833.
  6. Go to “Settings” then “Outbound” from the dropdown.
  7. Click on “Generate New Password”.
  8. Make a note of your credentials. You’ll need them to set up your trunk in 3CX.

Step 2: Configuring your SIP Trunk with 3CX

  1. Go to the 3CX Web client and follow the guide on how to configure a SIP trunk.
  2. Enter the main trunk number in international format (e.g. 447975777666).

About Bandwidth

For over 20 years, Bandwidth has worked to create a platform that enables customers to effectively live, work and communicate. With their extensive industry experience and modern software-driven approach, they are able to provide a simple, scalable and affordable SIP trunking solution which is now fully supported for use with 3CX PBX.

Last Updated

This document was last updated on 6 July 2023

https://www.3cx.com/docs/sip-trunk/voxbone/