Download the softphone installer from the official website at the link. Install it by following the instructions of the installer.
After installation, open Jitsi, go to Tools → Options.
Creating a new account:
Choose SIP as the network
As the SIP id, enter the "Internal number" of the employee
Enter "Password for SIP" as the password
Click "Advanced" to display additional settings
Go to the "Connection" section:
In the "Registrar" field, enter the IP address of MikoPBX to which the connection is being made.
Click "Next"
Click "Sign in"
Thus, we connected the Jitsi softphone to MikoPBX. Successful authorization is indicated by the status "Online". Confirmation of successful connection is the inscription "Online"