diff --git a/pom.xml b/pom.xml
index df6185c..8c50e8c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
 
     <groupId>com.zdjizhi</groupId>
     <artifactId>sip-rtp-correlation</artifactId>
-    <version>1.2.1</version>
+    <version>1.2.2</version>
 
     <name>Flink : SIP-RTP : Correlation</name>
 
diff --git a/src/main/java/com/zdjizhi/flink/voip/functions/VoIPFusionFunction.java b/src/main/java/com/zdjizhi/flink/voip/functions/VoIPFusionFunction.java
index a08f86b..c8e32b7 100644
--- a/src/main/java/com/zdjizhi/flink/voip/functions/VoIPFusionFunction.java
+++ b/src/main/java/com/zdjizhi/flink/voip/functions/VoIPFusionFunction.java
@@ -1,9 +1,8 @@
 package com.zdjizhi.flink.voip.functions;
 
 import com.zdjizhi.flink.voip.conf.FusionConfigs;
-import com.zdjizhi.flink.voip.records.Record;
-import com.zdjizhi.flink.voip.records.SchemaType;
-import com.zdjizhi.flink.voip.records.StreamDir;
+import com.zdjizhi.flink.voip.records.*;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.flink.api.common.functions.RuntimeContext;
 import org.apache.flink.api.common.state.*;
 import org.apache.flink.api.common.time.Time;
@@ -80,6 +79,8 @@ public class VoIPFusionFunction extends KeyedCoProcessFunction<Tuple2<Integer, A
             final ObjectNode rtpObj = entry.getValue();
             final Record rtpRecord = new Record(rtpObj);
 
+            completeOriginatorField(rtpRecord, new SIPRecord(sipObj));
+
             rtpRecord.merge(sipObj)
                     .setString(Record.F_COMMON_SCHEMA_TYPE, SchemaType.VOIP.getValue());
             out.collect(rtpObj);
@@ -121,6 +122,8 @@ public class VoIPFusionFunction extends KeyedCoProcessFunction<Tuple2<Integer, A
         final StreamDir streamDir = rtpRecord.getStreamDir();
         if (null != info) {
 
+            completeOriginatorField(rtpRecord, new SIPRecord(info.getObj()));
+
             rtpRecord.merge(info.getObj())
                     .setString(Record.F_COMMON_SCHEMA_TYPE, SchemaType.VOIP.getValue());
             out.collect(rtpObj);
@@ -150,9 +153,28 @@ public class VoIPFusionFunction extends KeyedCoProcessFunction<Tuple2<Integer, A
                         KeyedCoProcessFunction<Tuple2<Integer, Address>, ObjectNode, ObjectNode, ObjectNode>.OnTimerContext ctx,
                         Collector<ObjectNode> out) throws Exception {
         for (ObjectNode obj : rtpState.values()) {
+            final Record rtpRecord = new Record(obj);
+            rtpRecord.setInt(RTPRecord.F_ORIGINATOR_DIR, RTPRecord.OriginatorDir.UNKNOWN.getCode());
             out.collect(obj);
         }
         rtpState.clear();
         sipState.clear();
     }
+
+    // ======================================================================
+    //                             PRIVATE HELPER
+    // ======================================================================
+
+    private void completeOriginatorField(final Record rtpRecord, final SIPRecord sipRecord) {
+        if (StringUtils.isNoneBlank(rtpRecord.getClientIp())) {
+            if (StringUtils.equals(sipRecord.getOriginatorSdpConnectIp(), rtpRecord.getClientIp())) {
+                rtpRecord.setInt(RTPRecord.F_ORIGINATOR_DIR, RTPRecord.OriginatorDir.C2S.getCode());
+                return;
+            } else if (StringUtils.equals(sipRecord.getResponderSdpConnectIp(), rtpRecord.getClientIp())) {
+                rtpRecord.setInt(RTPRecord.F_ORIGINATOR_DIR, RTPRecord.OriginatorDir.S2C.getCode());
+                return;
+            }
+        }
+        rtpRecord.setInt(RTPRecord.F_ORIGINATOR_DIR, RTPRecord.OriginatorDir.UNKNOWN.getCode());
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/zdjizhi/flink/voip/records/RTPRecord.java b/src/main/java/com/zdjizhi/flink/voip/records/RTPRecord.java
new file mode 100644
index 0000000..c8df7db
--- /dev/null
+++ b/src/main/java/com/zdjizhi/flink/voip/records/RTPRecord.java
@@ -0,0 +1,27 @@
+package com.zdjizhi.flink.voip.records;
+
+import lombok.Getter;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.ObjectNode;
+
+public class RTPRecord extends Record {
+
+    public static final String F_ORIGINATOR_DIR = "rtp_originator_dir";
+
+    public RTPRecord(ObjectNode obj) {
+        super(obj);
+    }
+
+    @Getter
+    public enum OriginatorDir {
+
+        UNKNOWN(0),
+        C2S(1),
+        S2C(2);
+
+        private final int code;
+
+        OriginatorDir(int code) {
+            this.code = code;
+        }
+    }
+}
diff --git a/src/test/java/com/zdjizhi/flink/voip/records/RecordTest.java b/src/test/java/com/zdjizhi/flink/voip/records/RecordTest.java
index 829f5f5..0f22986 100644
--- a/src/test/java/com/zdjizhi/flink/voip/records/RecordTest.java
+++ b/src/test/java/com/zdjizhi/flink/voip/records/RecordTest.java
@@ -34,10 +34,10 @@ public class RecordTest {
         final ObjectNode obj = mapper.createObjectNode();
         final Record record = new Record(obj);
         record.setString(Record.F_COMMON_SCHEMA_TYPE, SchemaType.RTP.getValue());
-        assertEquals(SchemaType.RTP.getValue(), record.getSchemaType());
+        assertEquals(SchemaType.RTP, record.getSchemaType());
 
         obj.set(Record.F_COMMON_SCHEMA_TYPE, TextNode.valueOf(SchemaType.VOIP.getValue()));
-        assertEquals(SchemaType.VOIP.getValue(), record.getSchemaType());
+        assertEquals(SchemaType.VOIP, record.getSchemaType());
     }
 
     @Test