Background Music Description Background Music (BGM) sends music from a customer-provided music source to the Speakers of the Multiline Terminal when the station is idle.  Each 084M-B1 unit has 2 Audio In jacks on board and J431 (BGM) is used for BGM. As system can have 1 BGM input, effective BGM port needs to be determined at PRG 10-60-01. B Conditions • Background Music stops while the Multiline Terminal is in use. • Originating a call, answering a voice announcement, a ringing call, or internal paging interrupts Background Music. • Background Music is not available on Single Line Terminals. • Refer to Analog Communication Interface (ACI) for detail settings.