# SPDX-License-Identifier: GPL-2.0-only menuconfig ISDN_CAPI tristate "CAPI 2.0 subsystem" help This provides CAPI (the Common ISDN Application Programming Interface) Version 2.0, a standard making it easy for programs to access ISDN hardware in a device independent way. (For details see <http://www.capi.org/>.) CAPI supports making and accepting voice and data connections, controlling call options and protocols, as well as ISDN supplementary services like call forwarding or three-party conferences (if supported by the specific hardware driver). This subsystem requires a hardware specific driver. See CONFIG_BT_CMTP for the last remaining regular driver in the kernel that uses the CAPI subsystem. if ISDN_CAPI config CAPI_TRACE bool "CAPI trace support" default y help 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. config ISDN_CAPI_CAPI20 tristate "CAPI2.0 /dev/capi20 support" help 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. config ISDN_CAPI_MIDDLEWARE bool "CAPI2.0 Middleware support" depends on ISDN_CAPI_CAPI20 && TTY help 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. config ISDN_CAPI_CAPIDRV_VERBOSE bool "Verbose reason code reporting" depends on ISDN_CAPI_CAPIDRV help If you say Y here, the capidrv interface will give verbose reasons for disconnecting. This will increase the size of the kernel by 7 KB. If unsure, say N. endif