Describing a strange phenomenon:
The EM7305 modem initially starts as /dev/ttyUSB0.
After about 10 minutes, three more ports will be added automatically. ttyUSB1 to ttyUSB3.
This is accompanied by the status message:
Qualcomm USB modem converter now attached to ttyUSB1
Qualcomm USB modem converter now attached to ttyUSB2
Qualcomm USB modem converter now attached to ttyUSB3
How can I ensure that these ports are available immediately at startup?
Thanks.