Cortelco 2750 - Manual (Page 16)

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installations. This value can be changed to either 24 volts or 12 volts or the feature can be turned off.
To set Loop Voltage Detector
a.
Press MENU.
b. Press DOWN ARROW repeatedly until “Advanced Setting” appears in the display.
c. Press soft key under ENTER.
d. Press DOWN ARROW repeatedly until “Loop Detect:” appears in the display, along with the
current setting