> V2801F firmware can be used on TWCGPON657 stick. However, XPON Stick will keep rebooting due to invalid `VS_AUTH_KEY`, you have few seconds telnet access to update `VS_AUTH_KEY` or `echo 3 > /proc/fiber_mode` to prevent auto reboot.
# Auto Reboot
## V2801F
* XPON Stick will keep rebooting because invalid `VS_AUTH_KEY`
* Changing MAC Address `ELAN_MAC_ADDR` can cause invalid `VS_AUTH_KEY`
* You have few seconds to access telnet.
* To prevent auto reboot, enter: `echo 3 > /proc/fiber_mode` (*When set. you need disconnect fiber to get access*)