Proel AUP120R - Manuale (Pagina 25)

21. TELEPHONE CENTRAL AUDIO SIGNAL CONNECTIONS
Connect output terminal of the telephone central to TEL INPUT (fig.2
ref.15). Use the suitable connection considering the audio output
characteristics. Make reference to the telephone user manual.
Balanced connection
Unbalanced connection
22. AUDIO SIGNAL CONNECTION
MUSIC INPUT / MUSIC OUTPUT
Revert to the following conncection schemes.
UNBALANCED