Lucent Technologies PARTNER Advanced Communications System Programming And Use Instructions page 157

5. Program another button for this extension or exit programming mode.
Using
To turn Background Music on:
1. From a system phone with a speaker, press the programmed button or
press
If the phone is idle, you hear Background Music. If the Background Music
button has lights, the green light turns on.
2. To adjust the volume of Background Music, use the phone's volume control
buttons while listening to the Background Music.
To turn Background Music off:
Press the programmed button or press
If the Background Music button has lights, the green light turns off.
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Feature Reference
f 1 9
.
f 1 9
again.