Advantech-DLoG DLT-V7210KD User Manual page 139

WWAN Configuration
11.4.2. Trouble Shooting
Test virtual COM ports
In the device manager it is possible to test that the virtual COM ports are correctly set.
If they are not correctly set, they must be modified as appropriate.
The virtual COM ports must be set up as shown in the figure:
Fig. 11.8: QUECTEL EC25 - Virtual COM ports DLT-V72
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