1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/isdn/mISDN/Kconfig b/drivers/isdn/mISDN/Kconfig
index 231bd0d08316..6a97e86e7f21 100644
--- a/drivers/isdn/mISDN/Kconfig
+++ b/drivers/isdn/mISDN/Kconfig
@@ -7,3 +7,21 @@ menuconfig MISDN
         help
           Enable support for the modular ISDN driver.
 
+if MISDN != n
+
+config MISDN_DSP
+        tristate "Digital Audio Processing of transparent data"
+        depends on MISDN
+        help
+          Enable support for digital audio processing capability.
+          This module may be used for special applications that require
+          cross connecting of bchannels, conferencing, dtmf decoding
+          echo cancelation, tone generation, and Blowfish encryption and
+          decryption.
+          It may use hardware features if available.
+          E.g. it is required for PBX4Linux. Go to http://isdn.eversberg.eu
+          and get more informations about this module and it's usage.
+          If unsure, say 'N'.
+
+        source "drivers/isdn/hardware/mISDN/Kconfig"
+endif #MISDN