[asterisk-users] ExtenSpy d option 1.6

[Steve Casto]

I just installed asterisk 1.6.0.9 in the hope of using the d option in 
ExtenSpy(). I found this on the internet:

-      w             - Enable 'whisper' mode, so the spying channel can
talk to
-                      the spied-on channel.
-      W             - Enable 'private whisper' mode, so the spying channel can
-                      talk to the spied-on channel but cannot listen to that
-                      channel.
+      b                      - Only spy on channels involved in a bridged call.
+      B                      - Instead of whispering on a single channel barge in on both
+                               channels involved in the call.
+      d                      - Override the typical numeric DTMF functionality and instead
+                               use DTMF to switch between spy modes.
+                                       4 = spy mode
+                                       5 = whisper mode
+                                       6 = barge mode
+      g(grp)                 - Only spy on channels in which one or more of the groups
+                               listed in 'grp' matches one or more groups from the
+                               SPYGROUP variable set on the channel to be spied upon.
+                               Note that both 'grp' and SPYGROUP can contain either a
+                               single group or a colon-delimited list of groups, such
+                               as 'sales:support:accounting'.

http://www.das-asterisk-buch.de/2.1/applications-extenspy.html

When I do a core show application extenspy   the d option does not show 
up. Anyone know about this d option & how to use it ?
thanks