LG GT350 Service Manual page 140

2.5. Setup "Line System" menu such as the following figure
Adjust number of times
2.6.Setup Logic operation such as the following figure.
PWR: Power supply
CELL: Call Test Equipment
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Only for training and service purposes
GT50
GT50
Operation Mode
1. By-Pass: not control by GPIB
2. Normal: control by GPIB
Setup UART port
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10.ENGINEERING MODE
LGE Internal Use Only