Busy lamp fields are normally a light and button on a phone. The snom phones can have BLF enabled.
In your handset you set up BLF by specifying an extension number of a handset to be monitored. The busy light will typically be on solidly when in a call, or flashing when there is an incoming call ringing.
You can also subscribe to a hunt group using its extension number, this shows flashing when the hunt group has a ringing call.
*
) to make
the button a pickup/steal button. This is ideal to pick up a ringing call for a telephone or hunt
group when the light is flashing.