OpenSIPS 3.1 is so easy to install that I recommend you to skip the next video.

Step 1: Open your browser and go to the page:

https://apt.opensips.org

Step 2: Choose the release:

Choose OpenSIPS 3.1 or OpenSIPS 3.2

Step 3: Copy the commands from the page and run in the system.

For OpenSIPS 3.1 , use:

apt install gnupg2
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 049AD65B
echo "deb https://apt.opensips.org buster 3.1-releases" >/etc/apt/sources.list.d/opensips.list
echo "deb https://apt.opensips.org buster cli-nightly" >/etc/apt/sources.list.d/opensips-cli.list

For OpenSIPS 3.2, use:

apt install gnupg2
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 049AD65B
echo "deb https://apt.opensips.org buster 3.2-releases" >/etc/apt/sources.list.d/opensips.list
echo "deb https://apt.opensips.org buster cli-nightly" >/etc/apt/sources.list.d/opensips-cli.list

Step 4: Update the system to reflect the new packages

apt-get update

Step 5: Install OpenSIPS and OpenSIPS CLI (Command Line Interface)

apt install opensips
apt install opensips-cli

Step 6: Install all other modules

apt install opensips-*

Step 7: Start opensips and check the status

systemctl enable opensips
systemctl start opensips
systemctl status opensips

Step 8: If the installation is working you can skip the next video. If you didn't get to install, check the next video where you can see me installing with these instructions.