Hi I have a Draytek 2766 connected to a Gamma Sogea DSL line for SiP trunks. It has been configured and works well. However on two occasions the Lan 1 config has changed back to the default 192.168.1.1 and DCHP enabled.
The Wan settings, username and password, firewall,NAT settings are not affected? If I remote in and change Lan 1 to the correct ip address it then works OK again.

Obviously when the Lan changes the PBX loses the SiP trunk as its not on the same Lan as the PBX.

It seems to last about a week before it resets, I have checked the settings but can't find anything wrong....is there a timer or something?
Firmware is 4.4.3_BT.
Any help welcomed

25.01.24 I have now defaulted router and reloaded Firmware 4.4.3_BT just in case there is any corruption in the build......see what happens