Panasonic KX-TCA155 - Manual (Page 13)

Before Operating the PS
13
Ringer Volume Adjustment
Receiver/Speaker Volume Adjustment
Key Lock
You can lock the dialling buttons while the PS is in idle status.
Press the
Joystick. Select “ Ringer
Option ”.
Press the
Joystick. Select “ Ringer
Volume ”.
Adjust the volume
level (6 levels/Off).
Press the
Joystick.
Press the
Joystick.
During a conversation
Move the Joystick UP or DOWN to adjust the volume.
(Receiver Volume - 3 levels, Speaker Volume - 6 levels)
Press the Joystick for
more than 2 seconds
to lock/unlock.
Unlocked
<Display icon>
Locked