
ETS2228 Maintenance Manual
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Chapter4 Engineering Mode and Test Mode
4.1 Entrance to engineering mode and test mode
1、Entering test mode :
Inputting keypad command ##10999* to enter factory test mode:
Press 4 to hands-freeing voice loopback.
Press 6 to handle loopback.
Press “Delete” long time to LCD test in which all LCD will light and ring utter afterwards.
2、Entering RF calibration-FTM mode :
Open tool software QXDM and input “mode offline-d” in command window to modify 453NV as
“1”(”0” for normal mode )
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