Remove cui from description, as the normal serial cua devices are

also deprecated.

doc/ttyI.man.in

@@ -8,25 +8,19 @@
 .\"
 .TH ttyi 4 "@MANDATE@" "ISDN 4 Linux @I4LVERSION@" "Special files"
 .SH NAME
-ttyI, cui \- ISDN character devices with modem emulator
+ttyI \- ISDN character devices with modem emulator
 .SH DESCRIPTION
 .IB ttyI [ 0-63 ]
-and
-.IB cui [ 0-63 ]
 are emulated tty devices of the Linux
 .SM ISDN
 subsystem.
 These devices can be used in the same way as the traditional serial
 devices
-.IR ttySx " and " cuax .
+.IR ttySx.
 The official major device numbers are
 .B 43
 for
-.I ttyI
-and
-.B 44
-for
-.IR cui .
+.I ttyI .
 The minor device numbers start with
 .B 0
 and end with
@@ -422,8 +416,19 @@ Bit	Description
 .br
 	1 = Enable CPN extended FCON.
 .TP
+.SH NOTE
+There used also be
+.I cui
+devices (major device number 44), but since the
+.I cua
+devices for regular tty devices are no longer supported in the kernel,
+these are also no longer supported for ISDN4linux.
+
 .SH AUTHOR
 Fritz Elfert <fritz@isdn4linux.de>
+.br
+modified by Paul Slootman <paul@isdn4linux.de>
+
 .SH SEE ALSO
 .BR icnctrl "(8), " telesctrl "(8), " isdninfo "(4), " isdn_audio "(4), "
 .BR isdnctrl (8).