default or selected kernelversion does not have config value CONFIG_ISDN_DIVAS_MAINT.
Result is shown for kernelversion 6.9.9
DIVA Maint driver support
modulename: diva_mnt.ko
configname: CONFIG_ISDN_DIVAS_MAINT
Linux Kernel Configuration
└─>Device Drivers
└─>ISDN support
└─>CAPI 2.0 subsystem
└─>Active Eicon DIVA Server cards
└─>DIVA Maint driver support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
Enable Divas Maintenance driver.