diff --git a/modules/openstack_project/files/pbx/asterisk/extensions.conf b/modules/openstack_project/files/pbx/asterisk/extensions.conf
index b41cfa4e6c..015fb1a38e 100644
--- a/modules/openstack_project/files/pbx/asterisk/extensions.conf
+++ b/modules/openstack_project/files/pbx/asterisk/extensions.conf
@@ -2,14 +2,27 @@
 
 [public]
 
-exten => s,1,Goto(spam,1)
+exten => s,1,Answer()
+    same => n,Set(RETRIES=3)
+    same => n,Set(COUNT=0)
+    same => n,While($[${COUNT} < ${RETRIES}])
+    same => n,Read(CONFNUM,conf-getconfno)
+    same => n,Verbose(3,${CHANNEL(name)} entered conference number: ${CONFNUM})
+    same => n,GotoIf(${DIALPLAN_EXISTS(public,${CONFNUM},1)}?${CONFNUM},1)
+    same => n,Set(COUNT=$[${COUNT} + 1])
+    same => n,ExecIf($[${COUNT} < ${RETRIES}]?Playback(conf-invalid))
+    same => n,EndWhile()
+    same => n,Playback(vm-goodbye)
+    same => n,Hangup()
 
 ; Default setup for a Conference bridge.
 ;   Conferences are 6000 - 6999
 exten => _6XXX,1,Answer()
     same => n,ConfBridge(${EXTEN},,,sample_user_menu)
+    same => n,Hangup()
 
-exten => spam,1,Answer()
+; Easter egg -- spam on the keypad.
+exten => 7726,1,Answer()
     same => n,Playback(spam)
+    same => n,Hangup()
 
-exten => _X.,1,Goto(spam,1)