Dear Greg, Data Card here refers to 3G Dongle. Yes, it is right; device enumeration depends on the device itself. But, there must be some guideline defined regarding the same. As per the link (http://www.linux-usb.org/usb.devices.txt) USB device cannot be enumerated as Network controllers, please correct me if something has been overlooked. Would all 3G Dongle devices be enumerated as "ACM USB modems"? Warm Regards, Suresh On Sun, May 4, 2014 at 9:46 PM, Greg KH <greg@xxxxxxxxx> wrote: > On Sun, May 04, 2014 at 02:52:23PM +0530, Suresh Kumar N. wrote: >> Hi, >> >> I am new to udev and device enumeration. >> >> I am interested to know how USB Data Card would get enumerated. >> >> Based on my understanding Data Card can get enumerated below 2 possible ways - >> 1. As a modem >> 2. As a Network Interface Card (NIC) >> >> Is there a Standard defining the way a Data Card should be enumerated? > > What do you mean by "data card"? > > As for how the device is enumerated, that depends on the device itself, > and how it tells the operating system it should be talked to through its > configuration descriptors. See the USB spec for more details about > this. > > greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
