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To change the volume of digit tone
Operate the volume buttons on the screen lower of your terminal while displaying ST500 Call screen.
To switch on/off of the Message Waiting Indicator
Some items can be switch on/off of the Message Waiting Indicator.
1. Tap to display the pull-down menu, and tap Settings.
- The Settings screen is displayed.
Figure 328: To switch on/off of the MWI.
Figure 329: Tap the Settings to switch on/off of the MWI.
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