Toa N-8000 Series - Manual (Page 576)

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Chapter 6 SYSTEM SETTINGS USING THE BROWSER
(4) level
Displays sound volume set for the Sub station interface unit. Indicator abbreviations are as follows:
MIC: Microphone sensitivity
SP: Speaker output volume
Signal: Call tone volume
Click "Line Status" on the menu on the left side of the screen.
Displays information on line status and connected stations.
6.3. N-8400RS
[Operation buttons]
(1) Refresh
Updates status data for line and station to the latest data.