Panasonic KX-TG6572C Service Manual page 34

KX-TG6572C/KX-TG6572R/KX-TGA653C/KX-TGA653R
<How to change the Auto Disconnect activation time and VOX level>
A) Auto Disconnect activation time:
Some Telephone Company lines (fiber or cable) ON Hook and OFF Hook voltages are lower than conventional lines, which may
cause a malfunction of Auto Disconnect detection. To solve this problem, try changing the Auto Disconnect activation through
the procedures below.
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