1 files changed, 18 insertions, 1 deletions

diff --git a/drivers/isdn/mISDN/Kconfig b/drivers/isdn/mISDN/Kconfig
index 6a97e86e7f21..4938355c4072 100644
--- a/drivers/isdn/mISDN/Kconfig
+++ b/drivers/isdn/mISDN/Kconfig
@@ -23,5 +23,22 @@ config MISDN_DSP
           and get more informations about this module and it's usage.
           If unsure, say 'N'.
 
-        source "drivers/isdn/hardware/mISDN/Kconfig"
+config MISDN_L1OIP
+        tristate "ISDN over IP tunnel"
+        depends on MISDN
+        help
+          Enable support for ISDN over IP tunnel.
+
+          It features:
+            - dynamic IP exchange, if one or both peers have dynamic IPs
+            - BRI (S0) and PRI (S2M) interface
+            - layer 1 control via network keepalive frames
+            - direct tunneling of physical interface via IP
+
+          NOTE: This protocol is called 'Layer 1 over IP' and is not
+          compatible with ISDNoIP (Agfeo) or TDMoIP. Protocol description is
+          provided in the source code.
+
+source "drivers/isdn/hardware/mISDN/Kconfig"
+
 endif #MISDN