diff --git a/apps/sbc/etc/transparent.sbcprofile.conf b/apps/sbc/etc/transparent.sbcprofile.conf
index 1db5f845..ded34e98 100644
--- a/apps/sbc/etc/transparent.sbcprofile.conf
+++ b/apps/sbc/etc/transparent.sbcprofile.conf
@@ -1,6 +1,6 @@
 # transparent SBC profile
 #
-# This implements a transparent B2BUA
+# This implements a transparent B2BUA - all possible options are commented
 
 # defaults: transparent
 #RURI=$r
@@ -59,3 +59,7 @@
 #minimum_timer=90
 #session_refresh_method=UPDATE_FALLBACK_INVITE
 #accept_501_reply=yes
+
+## refuse call
+# refuse all calls with <code> <reason>
+#refuse_with="404 Not Found"
diff --git a/doc/Readme.sbc.txt b/doc/Readme.sbc.txt
index 887a8953..9a626d87 100644
--- a/doc/Readme.sbc.txt
+++ b/doc/Readme.sbc.txt
@@ -378,7 +378,7 @@ Examples:
 
 Example profiles
 ----------------
- transparent   - completely transparent B2BUA
+ transparent   - completely transparent B2BUA (contains all options in comments)
  auth_b2b      - identity change and SIP authentication (obsoletes auth_b2b app)
  sst_b2b       - B2BUA with SIP Session Timers (obsoletes sst_b2b app)
  call_timer    - call timer (obsoletes call_timer app)