How to install ISSABEL PBX by USB flash drive
1- Download ISSABEL ISO from https://www.issabel.org/latest-iso
2- Download RUFS utility https://rufus.ie/
3- Convert ISO to USB and choose Write in DD Inamge mode
Note :- If you will not choose Write in DD Image mode it will create bootable USB but while installation it will not get installation files and installation will fail.