I have just installed DAHDI 2.10.0.1 on a system running CentOS 5.11 (let's not get sidetracked into discussing the version of CentOS - there are reasons for using it in this case). The system has a TE220 card with 2xE1. It has been working fine, but when booting, the udev startup gives out warnings about ATTRS{hardware_id} and ATTRS{location} not being found. After doing some research, I changed ATTRS to SYSFS in the file /etc/udev/rules.d/dahdi.rules, and the warnings went away. Although I did notice that after making the change and rebooting, /dev/dahdi/devices only contained the symbolic link @Board, pointing to ../chan/001/031, and no longer contained subdirectories called 1 and 2, each of which previously contained 31 symbolic links, one for each channel (although it looks like those links actually contained one too many ../). So my questions are: 1. Was it correct on this system to change ATTRS back to SYSFS? I notice that it was changed to ATTRS in DAHDI 2.9. 2. Should /dev/dahdi/devices contain just @Board, or also 1/ and 2/? 3. Are the /dev/dahdi/devices entries used by Asterisk or anything else? Thanks for any advice! Cheers Tony -- Tony Mountifield Work: tony at softins.co.uk - http://www.softins.co.uk Play: tony at mountifield.org - http://tony.mountifield.org