This object is used by Optimuxes. - For Optimux 4E1/T1 Old Look: This MIB object enables the user to force the device to use specific link. autoredundancy= Main (Link 1) is the default link. When it will fail, the device will use Backup (Link 2). If Main recovers, it automatically returns to Main. autoWoReturn = Automatic Without Return. Main (Link 1) is the default link. When it will fail, the device will use Backup (Link 2). If Main recovers, it will NOT return to Main. It will continue using Backup. This option is supported only by LRS cards. main = Forces the device to start immediately use of Main (Link 1), no matter what is its state and stay there. No Redundancy. back = Forces the device to start immediately use of Backup (Link 2), no matter what is its state and stay there. No Redundancy. - For Optimux-T3, Optimux-155, Optimux-XL and OP-4 (New Look): This MIB object is used to select which Link will be used as MAIN. Therefore: autoredundancy - not supported main = Link A is MAIN (=default). back = Link B is MAIN.