Hi, I'm just setting up a new system using T28's with the latest firmware - 18.104.22.168. On previous setups, configuring BLF was easy - just enter the ext number and off it goes. I'm not sure if the problem is a 3CX issue or a phone issue. The new firmware setup looks like this: Key Type Mode Line Extension Pickup Number Line Key1 BLF Line1 100 *20* The mode is greyed out for the BLF option. With this setting, the light on the phone does not light up at any point - however, pressing the button will dial that extension number. Even when it dials the extension, the light does not come on. Can anyone shed any light on this for me? Cheers.