As a Broadsoft SPA5xx IP Phone Administrator, you may ask which LED settings are relevant to Broadsoft.
The LED settings are viewable from the phone's web-UI > Attendant Console tab > Attendant Key LED Pattern

The LED settings are also available from the SPC output:
<!-- Attendant Key LED Pattern -->
<Application_LED ua="na"></Application_LED>
<Serv_Subscribe_Failed_LED ua="na"></Serv_Subscribe_Failed_LED>
<Serv_Subscribing_LED ua="na"></Serv_Subscribing_LED>
<SNRM_Day_Mode_LED ua="na"></SNRM_Day_Mode_LED>
<SNRM_Night_Mode_LED ua="na"></SNRM_Night_Mode_LED>
<Parking_Lot_Idle_LED ua="na"></Parking_Lot_Idle_LED>
<Parking_Lot_Busy_LED ua="na"></Parking_Lot_Busy_LED>
<BLF_Idle_LED ua="na"></BLF_Idle_LED>
<BLF_Ringing_LED ua="na"></BLF_Ringing_LED>
<BLF_Busy_LED ua="na"></BLF_Busy_LED>
<BLF_Held_LED ua="na"></BLF_Held_LED>
Only the BLF related LED settings are applicable to a Broadsoft environment. The SPA5xx Adminstration Guide describes how to configure the LED illumination patterns if you'd like to change them.
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