diff --git a/doc/isdn_cause.man.in b/doc/isdn_cause.man.in
index 3d6d888f..4a9fbca8 100644
--- a/doc/isdn_cause.man.in
+++ b/doc/isdn_cause.man.in
@@ -1,12 +1,12 @@
-.\" $Id: isdn_cause.man.in,v 1.1 1997/02/23 12:23:46 fritz Exp $
+.\" $Id: isdn_cause.man.in,v 1.2 1997/02/26 19:59:24 fritz Exp $
 .\"
-.\" CHECKIN $Date: 1997/02/23 12:23:46 $
+.\" CHECKIN $Date: 1997/02/26 19:59:24 $
 .\"
 .\" Process this file with
 .\" groff -man -Tascii isdn_cause.7 for ASCII output, or
 .\" groff -man -Tps isdn_cause.7 for PostScript output
 .\"
-.TH TTYI 7 "@MANDATE@" Linux Miscellaneous
+.TH ISDN_CAUSE 7 "@MANDATE@" Linux Miscellaneous
 .SH NAME
 isdn_cause \- Description of ISDN cause messages.
 .SH DESCRIPTION
diff --git a/doc/isdninfo.man.in b/doc/isdninfo.man.in
index c6fac1b9..7bc07b14 100644
--- a/doc/isdninfo.man.in
+++ b/doc/isdninfo.man.in
@@ -1,10 +1,10 @@
-.\" $Id: isdninfo.man.in,v 1.1 1997/02/23 10:45:26 fritz Exp $
+.\" $Id: isdninfo.man.in,v 1.2 1997/02/26 20:01:20 fritz Exp $
 .\"
-.\" CHECKIN $Date: 1997/02/23 10:45:26 $
+.\" CHECKIN $Date: 1997/02/26 20:01:20 $
 .\"
 .\" Process this file with
-.\" groff -man -Tascii icnctrl.1 for ASCII output, or
-.\" groff -man -Tps icnctrl.1 for PostScript output
+.\" groff -man -Tascii isdninfo.4 for ASCII output, or
+.\" groff -man -Tps isdninfo.4 for PostScript output
 .\"
 .TH ISDNINFO 4 "@MANDATE@" Linux "Special files"
 .SH NAME
diff --git a/doc/ttyI.man.in b/doc/ttyI.man.in
index 57147291..f0d50c67 100644
--- a/doc/ttyI.man.in
+++ b/doc/ttyI.man.in
@@ -1,10 +1,10 @@
-.\" $Id: ttyI.man.in,v 1.3 1997/02/23 10:52:11 fritz Exp $
+.\" $Id: ttyI.man.in,v 1.4 1997/02/26 20:00:41 fritz Exp $
 .\"
-.\" CHECKIN $Date: 1997/02/23 10:52:11 $
+.\" CHECKIN $Date: 1997/02/26 20:00:41 $
 .\"
 .\" Process this file with
-.\" groff -man -Tascii icnctrl.1 for ASCII output, or
-.\" groff -man -Tps icnctrl.1 for PostScript output
+.\" groff -man -Tascii ttyI.4 for ASCII output, or
+.\" groff -man -Tps ttyI.4 for PostScript output
 .\"
 .TH TTYI 4 "@MANDATE@" Linux "Special files"
 .SH NAME
@@ -45,7 +45,12 @@ commands:
 .BR mgetty (8),
 .BR dip (8),
 .BR pppd (8)
-and more.
+and more. When enabled during kernel configuration, the emulator
+is capable of a reduced set of commands to support audio. To use
+audio features, an
+.SM ISDN
+card with a audio-capable low-level driver is needed. Currently
+the only audio-capable drivers are the teles and HiSax driver.
 
 The line disciplines are handled by the kernel so that SLIP,
 CSLIP and asynchronous PPP are possible.
@@ -55,6 +60,13 @@ The port speed of the
 tty devices is always 64000 bps.
 
 .SH AT COMMAND SET
+The description of
+.B AT commands
+here does
+.B not
+cover audio related commands. For a description of audio related commands,
+see
+.BR isdn_audio (4).
 The following 
 .B AT commands
 are supported by
@@ -373,4 +385,5 @@ See section
 .SH AUTHOR
 Fritz Elfert <fritz@wuemaus.franken.de>
 .SH SEE ALSO
-.BR icnctrl "(8), " telesctrl "(8), " isdninfo "(4), " isdnctrl (8).
+.BR icnctrl "(8), " telesctrl "(8), " isdninfo "(4), " isdn_audio "(4), "
+.BR isdnctrl (8).