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Bootable USB-flash drive

 The setup of the T300 and T500 system on a depending Hardware requires an ISO-file located on a bootable USB-flash drive.

This document is about how to create a bootable USB-flash drive using a Windows PC.

Please plugin the USB-flash drive to your PC.

CAUTION: The flash drive requires a minimum of 2GB free disk space.


!! This guidance is valid for v5.7!! Do not use for former software versions!

Step 1: Partition the USB-flash drive

  • Open the Windows taskbar and choose "run/execute"
  • Type in the command "diskpart" an press Enter.

Execute the following steps one after the other:

  • "list disk" - choose in the list the number of the USB-flash drive
  • "select disk x" - x is the number of the drive, the USB-flash drive is now selected
  • "list disk" - once more just to check, if the USB-flash drive is really selected. A * is shown at the selected drive.
  • "clean" - the USB-flash drive is getting cleaned up
  • "create partition primary" - creates a primary partition
  • "select partition 1" - partition one is chosen
  • "active" - activation of partition one
  • "format fs=fat32 quick" - the USB-flash drive is now formatted to file system FAT32 quickly
  • "assign" - to allocate a drive-letter to the flash drive
  • "exit" - closes diskpart


Step 2: Make it bootable

Use the tool UNetbootin.

You con find it here:

Download and execute the tool.


  • Choose the option Diskimage
  • Choose the desired file ".iso" behind ISO using ...
  • confirm OK
  • "Restart" causes a restart of your PC!!

Step 3: delete "Packages"

Delete the folder "Packages" on the USB-flash drive

Step 4: Copy .iso to flash drive

Copy the ISO-file to the root level on the USB-flash drive, the ISO file can be downloaded here.

Step 5: edit syslinux.cfg

Edit syslinux.cfg using a text editor (e.g. notepad++).

syslinux.cfg before

 default /menu.c32
 label linux
 menu label ^Install new system
 kernel vmlinuz
 append initrd=initrd.img xdriver=vesa nomodeset ks=cdrom:/ks/ks_unatt.cfg

syslinux.cfg after

default vesamenu.c32 [...] label linux menu label ^Install new system kernel vmlinuz append initrd=initrd.img xdriver=vesa nomodeset ks=hd:sda1:/ks/ks_unatt.cfg repo=hd:sda1:/ [...]


Unplug The USB-flash drive. It now could be used for setup the T300 / T500 PBX.



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