Depending on the hard phone you are using the buttons may be numbered per column downward. Example: 1-12 then the next column is 13-24. How the 3cx BLF buttons are currently numbered is top downward. This doesn't give you a 1to1 BLF layout. It would be a lot cleaner if you could layout the 3cx BLF keys just like the layout is on the hard phone. Easier for end users that switch from software to phone.