Use a specific device ?

[Jean-Christian de Rivaz]

Hello,

I have a system where the modem have multiple /dev/ttyACMx ports where x 
is not constant because of the dynamic nature of others serial devices. 
ModemManager always detect the rights ttyACMx of the modem but 
NetworkManager only allow to configure a connection for a fixed device. 
I tried to solve this problem by adding udev rules to fix the device 
name of the modem, but it's only possible to add a fixed symbolic link. 
ModemManager seem to ignore the fixed symbolic link and only use the 
dynamic ttyACMx.

Is there a way to force ModemManager to only use a specific symbolic 
link to control the modem, so that NetworkManger can be configured using 
a fix device name ?

Best Regards,
Jean-Christian de Rivaz