diff --git a/kamailio/default.cfg b/kamailio/default.cfg
index e9cb0a9..d2a605d 100644
--- a/kamailio/default.cfg
+++ b/kamailio/default.cfg
@@ -600,6 +600,7 @@ route[INTERNAL_TO_EXTERNAL_RELAY]
     #!endif
 
     t_on_reply("EXTERNAL_REPLY");
+    t_on_failure("EXTERNAL_FAULT");
 
     if($sel(cfg_get.kazoo.use_progressive_timers) == 1) {
         t_set_fr(0, $sel(cfg_get.kazoo.to_external_no_response_initial_timer));
@@ -715,9 +716,6 @@ onreply_route[INTERNAL_REPLY]
         setflag(FLAG_SESSION_PROGRESS);
     }
 
-        xlog("L_INFO", "$ci|pass|$T_req($si):$T_req($sp)\n");
-    }
-
 }
 
 failure_route[INTERNAL_FAULT]
@@ -783,7 +781,24 @@ failure_route[INTERNAL_FAULT]
         xlog("L_INFO", "$ci|failure|internal reply $T_reply_code $T_reply_reason\n");
         send_reply("$T_reply_code", "$T_reply_reason");
     }
-    xlog("L_INFO", "$ci|pass|$si:$sp\n");
+}
+
+
+failure_route[EXTERNAL_FAULT]
+{
+    # this branch handles failures (>=300) to external
+
+    route_if_exists("CUSTOM_EXTERNAL_FAULT");
+
+    # if the failure cause was due to the transaction being
+    # cancelled then we are complete
+    if (t_is_canceled()) {
+        xlog("L_INFO", "$ci|log|transaction was cancelled\n");
+        exit;
+    }
+
+    xlog("L_INFO", "$ci|failure|external reply $T_reply_code $T_reply_reason\n");
+    send_reply("$T_reply_code", "$T_reply_reason");
 }
 
 
@@ -808,20 +823,20 @@ route[INTERNAL_REDIRECT]
 }
 
 onsend_route {
-    if (isflagset(FLAG_ASSOCIATE_USER)) {
+    if (isflagset(FLAG_ASSOCIATE_USER) && is_request()) {
         $var(user_source) = $(ct{tobody.user}) + "@" + $si + ":" + $sp;
         xlog("L_INFO", "$ci|log|associate traffic from $var(user_source) with media server sip:$sndto(ip):$sndto(port)\n");
         $sht(associations=>$var(user_source))= "sip:" + $sndto(ip) + ":" + $sndto(port);
     }
 
     #!ifdef SIP_TRACE_ROLE
-    if (is_method("ACK") && isflagset(FLAG_SIP_TRACE)) {
+    if (is_method("ACK") && isflagset(FLAG_SIP_TRACE) && is_request()) {
         sip_trace();
     }
     #!endif
 
     if(!isflagset(FLAG_LOCAL_ROUTE)) {
-        xlog("L_INFO", "$ci|pass|$sndfrom(ip):$sndfrom(port) -> $sndto(ip):$sndto(port)\n");
+        xlog("L_INFO", "$ci|pass|$snd(sproto)|$sndfrom(ip):$sndfrom(port) -> $sndto(ip):$sndto(port)\n");
     }
 }
 
diff --git a/kamailio/globals.cfg b/kamailio/globals.cfg
index 7b423d9..fec92b0 100644
--- a/kamailio/globals.cfg
+++ b/kamailio/globals.cfg
@@ -93,3 +93,4 @@ disable_sctp = yes
 ####### multi homed #########
 mhomed=KZ_MULTI_HOMED
 
+onsend_route_reply=yes