Index: configs/sip.conf.sample
===================================================================
--- configs/sip.conf.sample	(revision 270514)
+++ configs/sip.conf.sample	(working copy)
@@ -123,8 +123,11 @@
 				 ; the call is in ringing or progress state. The SIP 
 				 ; channel will then send 183 indicating early media
 				 ; which will be empty - thus users get no ring signal.
-				 ; Setting this to "no" will stop any media before we have
-				 ; call progress. Default is "yes".
+				 ; Setting this to "yes" will stop any media before we have
+				 ; call progress (it means sip channel will not send 183 Session 
+				 ; Progress for early media). Also make sure that sip peer has
+				 ; progressinband=never. Default is "no" and it is only global
+				 ; sip settings. 
 ;useragent=Asterisk PBX          ; Allows you to change the user agent string
 ;promiscredir = no               ; If yes, allows 302 or REDIR to non-local SIP address
                                  ; Note that promiscredir when redirects are made to the