/lib/udev/rules.d/60-dahdi.rules is in dahdi 1:2.10.2-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | ACTION!="add", GOTO="dahdi_add_end"
# DAHDI devices with ownership/permissions for running as non-root
SUBSYSTEM=="dahdi", OWNER="asterisk", GROUP="asterisk", MODE="0660"
# Backward compat names: /dev/dahdi/<channo>
SUBSYSTEM=="dahdi_channels", SYMLINK+="dahdi/%m"
# Add persistant names as well
SUBSYSTEM=="dahdi_channels", ATTRS{hardware_id}!="", SYMLINK+="dahdi/devices/%s{hardware_id}/%s{local_spanno}/%n"
SUBSYSTEM=="dahdi_channels", ATTRS{location}!="", SYMLINK+="dahdi/devices/@%s{location}/%s{local_spanno}/%n"
LABEL="dahdi_add_end"
# hotplug scripts
SUBSYSTEM=="dahdi_devices", RUN+="%E{DAHDI_TOOLS_ROOTDIR}/usr/share/dahdi/dahdi_handle_device"
SUBSYSTEM=="dahdi_spans", RUN+="%E{DAHDI_TOOLS_ROOTDIR}/usr/share/dahdi/dahdi_span_config"
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