Panasonic KX-TD500 Installation Manual page 142

External Music Source
Adjust the sound level
of the music on hold
with the Volume
control.
CAUTION
Wiring should be done carefully to prevent this plug from being stressed in tension.
Otherwise, no sound may sometimes be heard through the external music source.
Installation
Use a two-conductor plug
(9/64 inch in diameter)
Input impedance : 8Ω
2.8 Peripheral Equipment
TSW Card
EXT MUSIC Jack 1
MUS1
MUS2
EXT MUSIC Jack 2
Figure 116:
143