There's a community website entirely devoted to this device, in French; it has useful, although sometimes outdated, information, and an active forum. Most info was taken from there.
|Version/Model||Launch Date||S/N||OpenWrt Version Supported||Model Specific Notes|
|NB4-SER-r0||?||-||10.03, probably 12.09||-|
|NB4-SER-r1||?||-||10.03, probably 12.09||-|
|NB4-FXC-r1||?||-||10.03, probably 12.09||-|
|NB4-FXC-r2||?||-||10.03, probably 12.09||-|
See this link (French) for more info on differences between versions.
|Intel IXP425@533MHz||32MiB||16MiB||4 x 1||Yes||Yes||?|
Download the Latest OpenWrt release. Warning: the "jffs2-128k" version has been reported not to work. The "jffs2-64k" version works, but leaves very small free space (~120 KB) on the device to install further software. So the "squashfs" version is recommended. Download it, and prepare the final image as follows (after moving to the directory where the downloads were made):
cat /dev/zero | tr '\000' '\377' | dd bs=64k of=openwrt-nb4-pour-flashimage count=128 seek=0 dd bs=64k of=openwrt-nb4-pour-flashimage if=openwrt-NEUFBOX4-squashfs-cfe.bin seek=1 dd bs=64k of=openwrt-nb4-pour-flashimage if=/dev/zero count=1 seek=127
Installation is then very simple:
|Version/Model||What to press||What you then see|
|NB4-SER-r0||Reset||service LED red on|
|NB4-SER-r2||Reset1)||service LED red on|
|NB4-FXC-r1||Reset||service LED red on|
|NB4-FXC-r2||Service||service LED blue blinking|
All LEDs can be set through LuCI as well as switched on/off from the shell, for instance as
echo 1 > /sys/class/leds/NB4-SER-r2:white:adsl/brightness
The "service" (top, with coloured LEDs), front (approximately on the logo), reset and wireless button can be used with hotplug (see the related page, section "Configuration"). Here you can find a couple of scripts which will turn on and off all the white LEDs when the front button is pushed.