Kenwood DNR-1000U - Manual (Page 9)

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TEL Mute
The audio system automatically mutes when a call
comes in.
When a call comes in
"CALL" is displayed.
The audio system pauses.
Listening to the audio during a call
Press the [POWER] button.
The "CALL" display disappears and the audio system
comes back ON.
When the call ends
Hang up the phone.
The "CALL" display disappears and the audio system
comes back ON.
⁄
• To use the TEL Mute feature, you need to hook up
the MUTE wire to your telephone using a commercial
telephone accessory.