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Re: GSM device in virtual serial port via USB

From: Pawel Kot
Subject: Re: GSM device in virtual serial port via USB
Date: Mon, 31 Aug 2009 16:58:51 +0200


On Mon, Aug 31, 2009 at 12:44, Vieri<address@hidden> wrote:
> Actually, after defining this udev rule:
> SUBSYSTEMS=="usb", ATTRS{product}=="usb serial converter", 
> ATTRS{manufacturer}=="FTDI", ATTRS{serial}=="FTCTWS1T", 
> SYMLINK+="ttyUSB-GSM-630725830"
> and after unplugging and re-connecting the USB cable to the system, gnokii 
> fails if trying to communicate with port ttyUSB-GSM-630725830:
> Gnokii serial_open: tcgetattr: Inappropriate ioctl for device
> Couldn't open ATBUS device: Inappropriate ioctl for device
> Telephone interface init failed: Command failed.
> (it was working well before disconnecting the USB cable)
> /dev/ttyUSB0 is still present and if I tell gnokii to use /dev/ttyUSB0 
> instead of /dev/ttyUSB-GSM-630725830 then it works fine.
> Can someone please shed some light here?

Just guessing: probably it's a problem that it's a symlink. You would
need to check it in Linux kernel sources.
What I can advice is not to create symlink but device file itself (I
think: NAME="ttyUSB-GSM-...", but please verify).

take care,
Pawel Kot

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