[Freeswitch-users] Setting custom presence/BLF

Hello, Is it possible to modify the presence/BLF status of a specific directory user, or of a virtual one? Can it be done with ESL + custom presence event? Is there an API to check/set presence status of a user (to use with an empty "virtual" user just for BLF light)? The purpose would be to control BLF lights on the phones to show custom status like: - show presence of endpoints connected to another FS - light up if at least one of several phones (department) is in a call - light up if coffee is ready - ... Thanks, François.