default or selected kernelversion does not have config value CONFIG_HISAX_HFC4S8S.
Result is shown for kernelversion 6.9.9
HFC-4S/8S based ISDN cards
modulename: hfc4s8s_l1.ko
configname: CONFIG_HISAX_HFC4S8S
Linux Kernel Configuration
└─>Device Drivers
└─>ISDN support
└─>Old ISDN4Linux (deprecated)
└─>Passive cards
└─>HFC-4S/8S based ISDN cards
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
This enables the driver for HFC-4S/8S based ISDN cards.