116 Chapter 9 Connecting the cables to the BCM50 systemNN40020-302The music source jack is on the front of the main unit. If you use the music source jack to connectthe music source, do not connect a music source to the music source pair on the RJ-21 telephonyconnector.To connect the music source using the music source jack1 Connect the miniature jack of the music source output (3.5 mm mono audio jack) to the musicsource input on the BCM50 main unit. See the figure Music source jack on page 116.Figure 52 Music source jack2 Adjust the volume of the music source to an appropriate level by placing a call and putting iton hold, and then adjust the volume at the music source.3 Select the appropriate option for your system:• If you add more auxiliary equipment, see Connecting an external paging system on page114 or Connecting an auxiliary ringer on page 114.• When you finish adding auxiliary equipment, proceed to Next step on page 118.To connect the music source using the RJ-21 telephonyconnector1 Connect the music source output to the music source input on the RJ-21 telephony connector.To determine which pair of wires to use for the music source input, see RJ-21 telephonyconnector wiring chart on page 207.2 Adjust the volume of the music source to an appropriate level by placing a call and putting iton hold, and then adjust the volume at the music source.Tip: You can adjust the background music volume at every telephone.Note: If you use the RJ-21 telephony connector to connect the musicsource, do not connect a music source to the music source jack on thefront of the main unit.TipSleeveMusic jackTip: Music signalRing: No connectionSleeve: GroundMusic sourceinputBCM50(3.5 mm mono audio jack)
