InHand InDTU324, Руководство пользователя

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5 FAQ
1) DTU332/DTU324 reboots frequently.
Troubleshooting procedure:
1. Check whether the device can go online by dialing.
2. Check whether the UIM/SIM/USIM card is correctly inserted into the DTU.
3. Check whether the UIM/SIM/USIM card is suspended for arrears, or damaged.
4. Check whether the dialing parameters (such as dial number, access point parameter, account,
and password) are correct.
5. Check whether wireless signal strength is lower than 20. Move the DTU to a place with stronger
signal strength and power on it to retry.
6. Check whether the power supply to the DTU is normal.
2) DTU332/DTU324 is powered on, but power indicator is off.
Troubleshooting procedure:
1. Check whether the DTU is securely connected to the power converter.
2. Check that the 100 V AC to 240 V AC power supply can be provided.
3. Check whether the power converter of DTU can output 5 V DC to 35 V DC voltage.
4. Check whether the indicator is burned. If so, contact the sales representative of InHand.
3) Failed to configure DTU332/324.
Troubleshooting procedure:
1. Check the serial port cable, whether the PC serial port works normally, and whether the port
selected by software is correct.
2. Check whether the output voltage can reach 5 V DC to 35 V DC and whether the polarity is
correct.
4) Failed to upgrade the DTU through serial port.
Troubleshooting procedure: