diff --git a/core/etc/ser-sems.sasi.cfg b/core/etc/ser-sems.sasi.cfg
index e77f69f4..898dfa3f 100644
--- a/core/etc/ser-sems.sasi.cfg
+++ b/core/etc/ser-sems.sasi.cfg
@@ -21,7 +21,7 @@ loadmodule "modules/sl/sl.so"
 loadmodule "modules/tm/tm.so"
 loadmodule "modules/xlog/xlog.so"
 loadmodule "modules/binrpc/binrpc.so"
-loadmodule "modules/hdrfilter/hdrfilter.so"
+#loadmodule "modules/hdrfilter/hdrfilter.so"
 loadmodule "modules/asi/asi.so"
 
 # ----------------- setting module-specific parameters ---------------
@@ -76,9 +76,16 @@ route
 
 route[ASI]
 {
-	$sems_cmd = "sems";
-	#$sems_hdrs = "P-App-Name: announcement\n";
-	$sems_hdrs = "P-App-Name: callback\n";
+	# $sems_cmd is the application which SEMS executes; 
+ 	# $sems_hdrs is passed as additional headers. E.g. 
+	# a "compatibility" configuration to 0.9.6 ser-sems.cfg 
+        # would be 
+	#   $sems_cmd = @hf_value.p_app_name;
+	#   xlset_attr("$sems_hdrs", "P-App-Param: %@hf_value.p_app_param\n");
+
+	$sems_cmd = "announcement";
+	#	$sems_hdrs = "P-App-Name: announcement\n";
+
 	if (! asi_dispatch("sems")) {
 		if ($? == -2) $stat = "failed";
 		else if ($? == -1) $stat = "not interested";
@@ -99,7 +106,7 @@ onreply_route["addavp"]
 		else if (@hf_value.contact)
 			xlset_attr("$sems_hdrs", "Contact: %@hf_value.contact\n");
 	} else if (@cseq.method == "INVITE") {
-		$sems_hdrs = "P-App-Name: callback\n";
+		#$sems_hdrs = "P-App-Name: callback\n";
 		if (@hf_value.proxy_authenticate)
 			xlset_attr("$sems_hdrs", "Proxy-Authenticate: %@hf_value.proxy_authenticate\n");
 		else if (@hf_value.contact)