Chapter 4 - Terminals and Optional EquipmentChapter 4 4 - 9SECTION 4-3BACKGROUND MUSIC4.3.1 Installing Background Music (Figure 4-9)Background Music (BGM) sends music from a customer-provided music source to speakers in keysets. If anextension user activates it, BGM plays whenever the user’s extension is idle.1. Connecting to the CCPU:Connect a sub-mini jack into the CN8 or CN9 connector on the CCPU to the appropriate location on theextension cross-connect block.2. Connect the two-conductor station cable from the cross-connect block to the external music source.3. Install bridging clips as required.4. Define the programming in 10-21-04 and 10-21-05 for the Background Music connection.Figure 4-9: CCPU CONNECTIONS✎ Refer to Background Music in the software manual for additional programming options and information.Gbit EthernetFast Ethernet CN7Status LED1Status LED2Status LED3Status LED4Serial CN6 (special use)BGM/EXSPControl Relay CN10Aux In/Out BGM/EXSPControl CN8Aux In/Out BGM/EXSPControl CN9Load/SW1USB CN5VOIPDBMEMDBCN3CN1BatteryCN4CN2SW6Status LED5