diff --git a/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.c b/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.c
index 5b173bfc8b..810c5a2902 100644
--- a/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.c
+++ b/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.c
@@ -1039,7 +1039,7 @@ static int ftmod_m2ua_dlsap_config(int id)
 
    cfg.t.cfg.s.dlSapCfg.lnkNmb 	= id; /* SapId */
    cfg.t.cfg.s.dlSapCfg.intfId.type = LMW_INTFID_INT;
-   cfg.t.cfg.s.dlSapCfg.intfId.id.intId = id;
+   cfg.t.cfg.s.dlSapCfg.intfId.id.intId = m2ua->iid;
    
    cfg.t.cfg.s.dlSapCfg.swtch = LMW_SAP_ITU;
 
diff --git a/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.h b/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.h
index c7ce2e74eb..8bb564d284 100644
--- a/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.h
+++ b/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua.h
@@ -59,6 +59,7 @@ typedef struct sng_m2ua_cfg{
 	char 	    		 name[MAX_NAME_LEN];
 	uint32_t    		 flags;
 	uint32_t    		 id;		/* ID */
+	uint32_t    		 iid;		/* ID */
 	uint8_t    		 nodeType; 	/*Node Type SG/ASP */
 	uint8_t    		 end_point_opened; /* flag to check is end-point already opened */	
 	uint16_t    		 clusterId;	/* idx to m2ua_cluster profile */
diff --git a/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua_xml.c b/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua_xml.c
index b9ae986402..bb011c364e 100644
--- a/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua_xml.c
+++ b/libs/freetdm/src/ftmod/ftmod_sangoma_ss7/ftmod_sangoma_ss7_m2ua_xml.c
@@ -242,6 +242,12 @@ static int ftmod_ss7_parse_m2ua_interface(ftdm_conf_node_t *m2ua_interface)
 
 			SS7_DEBUG("Found an m2ua cluster_id = %d\n", sng_m2ua.clusterId);
 		/**********************************************************************/
+		} else if (!strcasecmp(parm->var, "interface-identifier")) {
+		/**********************************************************************/
+			sng_m2ua.iid=atoi(parm->val);
+
+			SS7_DEBUG("Found an m2ua interface-identifier = %d\n", sng_m2ua.iid);
+		/**********************************************************************/
 		} else {
 		/**********************************************************************/
 			SS7_ERROR("Found an invalid parameter %s!\n", parm->var);
@@ -271,6 +277,7 @@ static int ftmod_ss7_fill_in_m2ua_interface(sng_m2ua_cfg_t *m2ua_iface)
 	g_ftdm_sngss7_data.cfg.g_m2ua_cfg.m2ua[i].id		= m2ua_iface->id;
 	g_ftdm_sngss7_data.cfg.g_m2ua_cfg.m2ua[i].nodeType 	= m2ua_iface->nodeType;
 	g_ftdm_sngss7_data.cfg.g_m2ua_cfg.m2ua[i].clusterId 	= m2ua_iface->clusterId;
+	g_ftdm_sngss7_data.cfg.g_m2ua_cfg.m2ua[i].iid 		= m2ua_iface->iid;
 	sngss7_set_flag(&g_ftdm_sngss7_data.cfg, SNGSS7_M2UA_PRESENT);
 
 	return 0;