diff -u -p linux/Documentation/Configure.d2.help linux/Documentation/Configure.help
--- linux/Documentation/Configure.d2.help       Wed Nov  7 18:25:11 2001
+++ linux/Documentation/Configure.help  Wed Nov  7 18:33:18 2001
@@ -22202,14 +22202,21 @@ CONFIG_IRDA
   read the IR-HOWTO, available at
   <http://www.linuxdoc.org/docs.html#howto>.
 
+  If you want to exchange bits of data (vCal, vCard) with a PDA, you
+  will need to install some OBEX application, such as OpenObex :
+  <http://sourceforge.net/projects/openobex/>
+
   This support is also available as a module called irda.o.  If you
   want to compile it as a module, say M here and read
   <file:Documentation/modules.txt>.
 
 Ultra (connectionless) protocol
 CONFIG_IRDA_ULTRA
-  Say Y here to support the connectionless Ultra IRDA protocol, also
-  called IrOBEX.
+  Say Y here to support the connectionless Ultra IRDA protocol.
+  Ultra allows to exchange data over IrDA with really simple devices
+  (watch, beacon) without the overhead of the IrDA protocol (no handshaking,
+  no management frames, simple fixed header).
+  Ultra is available as a special socket : socket(AF_IRDA, SOCK_DGRAM, 1);
 
 IrDA protocol options
 CONFIG_IRDA_OPTIONS