AASTRA 4187 Plus for BusinessPhone User Guide EN - Manual (Page 79)

79 BusinessPhone – Dialog 4187 Plus
Settings
Enable/Disable the Call Duration Timer
You can turn the Call Duration Timer in the display on or off. ²
Press.
¯
or
·
Press to navigate to the CALL DURATION TIMER menu.
´ ²
Press to enter the menu.
The display shows the current setting, for example:
Note: The default setting is ON. ¯
or
·
Press to toggle between ON and OFF.
´ ²
Press to save and exit.
CALL DURATION TIMER
ON