Why CDC-ACM Interface does not work for "Talkman USB Serial" device ?

Solution Unverified - Updated -

Issue

  • We have a USB device that presents a CDC-ACM interface that is used as a serial interface to the device. The device works fine with RHEL 6 and a variety of other Linux variants. However when we attach this device to our RHEL 5 system we do not end up with the expected ttyACM0 device.

Environment

  • Red Hat Enterprise Linux - 5.8
  • Talkman USB Serial

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