It did not work with DEVICE=/dev/ttyUSB3
...
Using Configuration file /home/ham/linbpq/bpq32.cfg
Source record not recognised - Ignored:DEVICE=/dev/ttyUSB3
...
Initialising Port 01 Telnet Server
Initialising Port 02 SCS Pactor /dev/ttyUSB1
Initialising Port 03 TCPKISS IP 127.0.0.1 Port 8001 Chan A
Initialising Port 04
UZ7HO Host 127.0.0.1 Port 8000 Chan A
Initialising Port 05
UZ7HO Host 127.0.0.1 Port 8000 Chan B
Com Open Failed: No such file or directory
Initialising Port 06 KAM Pactor NOPORT NOPORT could not be opened
As the other option, I tried to create a simlink:
ln -s /dev/ttyUSB3 /dev/com4
com4 appeared in /dev/ but it did not work either:
Initialising Port 01 Telnet Server
Initialising Port 02 SCS Pactor /dev/ttyUSB1
Initialising Port 03 TCPKISS IP 127.0.0.1 Port 8001 Chan A
Initialising Port 04
UZ7HO Host 127.0.0.1 Port 8000 Chan A
Initialising Port 05
UZ7HO Host 127.0.0.1 Port 8000 Chan B
Com Open Failed: No such file or directory
Initialising Port 06 KAM Pactor com4 com4 could not be opened