Hello,
I have an embedded product running on top of MQX OS, with a built in CDC-ACM driver. In “4118543 ALEOS 4.4.4 Software Configuration User Guide for GX400 and GX440_r1” i can see that the modems have a USBNet operating mode (that should work with CDC-ACM), in which they act as a virtual Ethernet port.
The questions 
- Is it possible to open multiple TCP connections simultaneously?
- Is it possible to open multiple UDP connections simultaneously?
- Is it possible to open multiple TCP/UDP connections simultaneously?
Thanks,
Evgeny