How to open port ttyACM0-4 in sierra wireles FXT009

Hallo All, I am using sierra wireless FXT009 and I do see port ttyACM0 in directory /dev in ubuntu but I don’t see port ttyACM1, ttyACM2, ttyACM3, ttyACM4 in directory /dev. How to open port ttyACM1- 4 in directory /dev use AT Command ?

Please give me some suggestions, it would be really helpful to me.

Thanks for help.


FXT009 has a Q2686/7 inside it which is a 2G unit that only has a single CDC ACM USB end point implementation so you wil only see a single interface.