If your system is equipped with Silent Monitor software you will have SiL on the Main menu screen in the options. If so you will need to go to station programming screen (A screen) and enter the extension you want to program keys for. Enter K for keys and this will take you to key programming. The key codes for both are 816 for Barge In and 833 for Silent Monitor. This programming cannot be done via phone. Hope this helps. Thank you.