diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index 281aa511da..d865be6ee7 100644
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -5815,7 +5815,7 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
 				tech_pvt->remote_sdp_str = switch_core_session_strdup(session, r_sdp);
 				switch_channel_set_variable(channel, SWITCH_R_SDP_VARIABLE, r_sdp);
 
-				if (sofia_test_flag(tech_pvt, TFLAG_LATE_NEGOTIATION) && (parser = sdp_parse(NULL, r_sdp, (int) strlen(r_sdp), 0))) {
+				if ((sofia_test_flag(tech_pvt, TFLAG_LATE_NEGOTIATION) || switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) && (parser = sdp_parse(NULL, r_sdp, (int) strlen(r_sdp), 0))) {
 					if ((sdp = sdp_session(parser))) {
 						sofia_glue_set_r_sdp_codec_string(session, sofia_glue_get_codec_string(tech_pvt), sdp);
 					}
diff --git a/src/mod/endpoints/mod_sofia/sofia_glue.c b/src/mod/endpoints/mod_sofia/sofia_glue.c
index 2cb2fdd551..e96f1e1802 100644
--- a/src/mod/endpoints/mod_sofia/sofia_glue.c
+++ b/src/mod/endpoints/mod_sofia/sofia_glue.c
@@ -776,19 +776,23 @@ void sofia_glue_set_local_sdp(private_object_t *tech_pvt, const char *ip, switch
 
 const char *sofia_glue_get_codec_string(private_object_t *tech_pvt)
 {
-	const char *codec_string = NULL, *preferred = NULL, *fallback = NULL;
-
-	if (switch_channel_direction(tech_pvt->channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
-		preferred = tech_pvt->profile->outbound_codec_string;
-		fallback = tech_pvt->profile->inbound_codec_string;
-	} else {
-		preferred = tech_pvt->profile->inbound_codec_string;
-		fallback = tech_pvt->profile->outbound_codec_string;
+	const char *preferred = NULL, *fallback = NULL;
+	
+	if (!(preferred = switch_channel_get_variable(tech_pvt->channel, "absolute_codec_string"))) {
+		preferred = switch_channel_get_variable(tech_pvt->channel, "codec_string");
+	}
+	
+	if (!preferred) {
+		if (switch_channel_direction(tech_pvt->channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
+			preferred = tech_pvt->profile->outbound_codec_string;
+			fallback = tech_pvt->profile->inbound_codec_string;
+		} else {
+			preferred = tech_pvt->profile->inbound_codec_string;
+			fallback = tech_pvt->profile->outbound_codec_string;
+		}
 	}
 
-	codec_string = !zstr(preferred) ? preferred : fallback;
-
-	return codec_string;
+	return !zstr(preferred) ? preferred : fallback;
 }
 
 void sofia_glue_tech_prepare_codecs(private_object_t *tech_pvt)
diff --git a/src/switch_ivr_originate.c b/src/switch_ivr_originate.c
index c18da450a6..72d0ab0393 100644
--- a/src/switch_ivr_originate.c
+++ b/src/switch_ivr_originate.c
@@ -384,8 +384,10 @@ static void inherit_codec(switch_channel_t *caller_channel, switch_core_session_
 {
 	const char *var = switch_channel_get_variable(caller_channel, "inherit_codec");
 	switch_channel_t *channel = switch_core_session_get_channel(session);
-	
-	if (switch_true(var)) {
+
+	if (!zstr(var) && !strcasecmp(var, "passthru")) {
+		switch_channel_set_variable(caller_channel, "absolute_codec_string", switch_channel_get_variable(channel, "ep_codec_string"));
+	} else if (switch_true(var)) {
 		switch_codec_implementation_t impl = { 0 };
 		switch_codec_implementation_t video_impl = { 0 };
 		char tmp[128] = "";