diff --git a/elink-online-common b/elink-online-common
index 5dae063..d81aeee 160000
--- a/elink-online-common
+++ b/elink-online-common
@@ -1 +1 @@
-Subproject commit 5dae063fe5e3f7bb54fc0a434d9ab233f96342bc
+Subproject commit d81aeeef676f61f94da7107859920c7ba5beb593
diff --git a/elink-online-transformer b/elink-online-transformer
index c8a58fd..17f6df5 160000
--- a/elink-online-transformer
+++ b/elink-online-transformer
@@ -1 +1 @@
-Subproject commit c8a58fdf5be7f6eb4e2f16a0ce83791132e2a67e
+Subproject commit 17f6df50688bde6b2adff48c4e914841314fd517
diff --git a/src/main/resources/standard-message-mapping-config-djb.properties b/src/main/resources/standard-message-mapping-config-djb.properties
index dd7c8fa..b293ad4 100644
--- a/src/main/resources/standard-message-mapping-config-djb.properties
+++ b/src/main/resources/standard-message-mapping-config-djb.properties
@@ -16,10 +16,9 @@ SEND_TIME=HEAD.frst_mesg_dman_time
 RECV_TIME=HEAD.mesg_rspn_time
 SYSTEM_TYPE=HEAD.trnm_sys_dvcd
 TIMEOUT=HEAD.gnrz_tmot_tktm
-INST_CODE=HEAD.eai_node_dvcd
+INST_CODE=HEAD.xtis_cd
 USER_ID=HEAD.tlrno
-REQ_SYS_CODE=HEAD.chnl_tycd
-# MSG 영역 (응답 시 활성화)
+REQ_SYS_CODE=
 ERROR_CODE=MSG.MAIN_MSG.outp_msg_cd
 ERROR_MSG=MSG.MAIN_MSG.outp_msg_ctnt
 RESPONSE_TYPE=HEAD.procs_rslt_dvcd
diff --git a/src/test/java/com/eactive/eai/custom/message/StandardMessageFlatFlowTest.java b/src/test/java/com/eactive/eai/custom/message/StandardMessageFlatFlowTest.java
index 03b361c..b028d3f 100644
--- a/src/test/java/com/eactive/eai/custom/message/StandardMessageFlatFlowTest.java
+++ b/src/test/java/com/eactive/eai/custom/message/StandardMessageFlatFlowTest.java
@@ -510,6 +510,16 @@ class StandardMessageFlatFlowTest {
                 String.format("응답 FLAT 길이(%d) > 요청 FLAT 길이(%d) 이어야 함 (MSG 블록 포함 여부)",
                         rspBytes.length, reqBytes.length));
     }
+    
+    @Test
+    void 비ERP요청_FLAT_왕복_HEAD_chnl_tycd_EAI값확인() throws Exception {
+        StandardMessage dst = flatRoundTrip(parseJson(NON_ERP_REQ_JSON));
+
+        assertEquals("EAI", dst.findItemValue("HEAD.chnl_tycd").trim(),
+                "FLAT 왕복 후 HEAD.chnl_tycd EAI 확인");
+    }
+
+    
 
     // ================================================================
     // helpers