If you are also facing the same issue of installing 3CX Phone System on your cloud, let’s see what to do.

Prerequisite for 3CX Phone System

A cloud instance with Debian ISO installed on it. We will be trying Debian Linux 10.

Adding the repository

Run the commands below as the root user:

apt install gnupg

wget -O- http://downloads-global.3cx.com/downloads/3cxpbx/public.key | apt-key add -

echo "deb http://downloads-global.3cx.com/downloads/debian buster main" | tee /etc/apt/sources.list.d/3cxpbx.list

apt update && apt install net-tools dphys-swapfile htop mtr screen curl dnsutils -y

Commands for installing 3CX

apt install 3cxpbx -y

Start the installation

The installation already began with the previous command apt install 3cxpbx -y. When asked, Press Tab to select the <Ok> button and press Enter to accept the 3cx license agreement.

Finish the Installation of 3CX Phone System

When the installation is finished, you will see the following screen, which asks you to select the configuration option. I’d recommend typing 1 (which selects Using a Web Browser) and hitting Enter, which will show you the URL to configure 3CX Phone System.

To configure 3CX Phone System and finish, you might look into this article. As you know 3cx has launched v20 which requires Debian 12. If you are willing to install the 3cx v20 on Debian 12, follow this tutorial.