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Old 09-25-2012, 01:41 AM   #1
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How to 'talk' to USB modem in Ubuntu 12.04 after being found with lsusb?

I have a USB modem that is identified in Linux (Ubuntu 12.04) with lsusb as

Bus 001 Device 003: ID 0572:1329 Conexant Systems (Rockwell), Inc.

My question: How to talk to that device (e.g. with microcom etc?)? What dev device should I use? There is no /dev/ttyUSBXXX available and just one /dev/ttyACM0. Is it the ACM0? How to know?
Old 09-25-2012, 07:13 AM   #2
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You may want to take a look at USB_ModeSwitch ( It may already be installed on your system. If I remember correctly, Conexant modems need to be switched-out and that's what USB_ModeSwitch does.

Also, you may need drivers for it; refer to for information.

Hope this helps some.

Last edited by tronayne; 09-25-2012 at 07:21 AM.
Old 09-25-2012, 08:43 AM   #3
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On the site tronayne mentioned there's this page:

It gives steps,... step-by-step, for setting up the Conexant modems...
Old 09-25-2012, 09:01 AM   #4
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I have a usb modem and the correct driver for it is /dev/ttyACM0. Select it as your modem and if it isn't the correct driver you will get modem errors, when dialing out. Here is a link to how to dial out.

Last edited by colorpurple21859; 09-25-2012 at 09:29 AM.


modem, ubuntu 12.04, usb

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