110 Chapter 9 Connecting the cables to the BCM50 system
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To connect the music source using the music source jack
1 Connect the miniature jack of the music source output (3.5 mm mono audio jack) to the music
source input on the BCM50 main unit (see Figure 45).
Figure 45 Music source jack
2 Adjust the volume of the music source to an appropriate level by placing a call and putting it
on hold, then adjusting the volume at the music source.
3 Select the appropriate option for your system:
• If you are adding more auxiliary equipment, refer to “Connecting an external paging
system” on page 108 or “Connecting an auxiliary ringer” on page 107.
• If you are finished adding auxiliary equipment, proceed to “Next step” on page 112.
To connect the music source using the RJ-21 telephony
connector
1 Connect the music source output to the music source input on the RJ-21 telephony connector.
Refer to the “RJ-21 telephony connector wiring chart” on page 205 to determine which pair of
wires is used for the music source input.
2 Adjust the volume of the music source to an appropriate level by placing a call and putting it
on hold, then adjusting 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 music
source, do not connect a music source to the music source jack on the
front of the main unit.
Tip: You can adjust the background music volume at every telephone.
Tip
Sleeve
Music jack
Tip: Music signal
Ring: No connection
Sleeve: Ground
Music source
input
BCM50
(3.5 mm mono audio jack)
