If you say Y here, the CAPI drivers will give verbose reasons for disconnecting. This will increase the size of the kernel by 7 KB. If unsure, say Y.
If you say Y here, the kernelcapi driver can make verbose traces of CAPI messages. This feature can be enabled/disabled via IOCTL for every controller (default disabled). This will increase the size of the kernelcapi module by 20 KB. If unsure, say Y.
This option will enhance the capabilities of the /dev/capi20 interface. It will provide a means of moving a data connection, established via the usual /dev/capi20 interface to a special tty device. If you want to use pppd with pppdcapiplugin to dial up to your ISP, say Y here.
This option will provide the CAPI 2.0 interface to userspace applications via /dev/capi20. Applications should use the standardized libcapi20 to access this functionality. You should say Y/M here.
This option provides the glue code to hook up CAPI driven cards to the legacy isdn4linux link layer. If you have a card which is supported by a CAPI driver, but still want to use old features like ippp interfaces or ttyI emulation, say Y/M here.