Panasonic KX-TDA15 - Manual (Page 164)

2.1 Control Features
164 User Manual
2.1.4 Turning on the External Background Music (BGM)
The manager extension can select and broadcast background music in the office through external speakers.
To select and start/stop the background music
PT/SLT/PS
Off-hook. On-hook. Enter 35.
OR
0
1
Enter 1 to start
or 0 to stop.
5 3
C.Tone
Enter 1 .
1
Start
Stop