Re: [hylafax-users] Configuration change for USB modem

[Laurent LEGENDRE <geminux50@xxxxxxxxx>]

Hi,
You can fix modem device name with udev rules.

Try :
udevadm info -a -p $(udevadm info -q path -n /dev/ttyS0 )

This will display information about your device and parent devices like this :

    SUBSYSTEMS=="usb"
    ATTRS{manufacturer}=="Modem Manufacturer"
    ATTRS{product}=="USB MODEM"
    ATTRS{serial}=="L460100118770666380"


An Udev rule can create a device node or a symlink based on these values
e.g :   SUBSYSTEM=="usb", ATTRS{serial}=="L72010011070626380", SYMLINK+="myfax1"

Useful Links :
http://reactivated.net/writing_udev_rules.php
http://ubuntuforums.org/showthread.php?t=168221

2010/11/17 dev.malst <dev.malst@xxxxxxxxxxxx>

We use USB Modem, unfortunately when the server restarts can happen that the USB ports will change and a modem uses configuration file created for some other modem, creating problems of communication. You can tell us a system to avoid this problem?