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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


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Old 12-26-2007, 06:15 PM   #1
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Its killing me

I got a usb modem that works fine with windows(its got the software) Getting my FedoraCore6 machine to recognize the modem has been most impossible (for naive me) Please help.
Old 12-26-2007, 07:12 PM   #2
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USB = Universal Serial Bus. Most USB modems are winmodems, so many will not work with Linux. Linux has support for modems that conform to the USB Communication Device Class Abstract Control Model (= USB CDC ACM). There's a module for ACM named acm.o. See the /usb/acm.txt document in the kernel documentation directory (/usr/share/doc/kernel-doc-2.6.x in Debian, perhaps /usr/doc/kernel... in some distributions). The ACM "serial port" for the first (0th) such modem is: /dev/usb/acm/0 or possibly /dev/usb/ttyACM0. This should be the case regardless of whether or not you use the new "device file system". It's not really a serial port, but the driver makes it look like a serial port to software which uses the modem.

Since the bandwidth on the USB is high it's possible to send a lot more that just data to a USB modem. This means that it's feasible to create a USB winmodem where the driver does most of the modem's work on the CPU and sends the results to the modem. So beware of USB winmodems (unless they have Linux support).

What specific type of USB modem is it?

Also see:
Old 12-26-2007, 07:15 PM   #3
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You need to tell us the make and model of the modem and let us now what searches you have already tried.
Old 12-29-2007, 03:30 PM   #4
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In the second thread the following link was suggested:

So, in short, connect the modem and check if you have /dev/ttyUSB0 (or later number if you have more similar devices). Use that name instead of /dev/modem.


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