diff --git a/DMRLookup.cpp b/DMRLookup.cpp
index 099ade3..71ce3d3 100644
--- a/DMRLookup.cpp
+++ b/DMRLookup.cpp
@@ -80,28 +80,27 @@ void CDMRLookup::stop()
 	wait();
 }
 
-std::string CDMRLookup::findWithName(unsigned int id)
+void CDMRLookup::findWithName(unsigned int id, class CUserDBentry *entry)
 {
 	std::string callsign;
 
-	if (id == 0xFFFFFFU)
-		return std::string("ALL");
-
-	class CUserDBentry entry;
-	if (m_table.lookup(id, &entry)) {
-		// callsign is always available
-		callsign = entry.get(keyCALLSIGN);
-		if (!entry.get(keyFIRST_NAME).empty())
-			callsign += " " + entry.get(keyFIRST_NAME);
-
-		LogDebug("FindWithName =%s",callsign.c_str());
-	} else {
-		char text[10U];
-		::snprintf(text, sizeof(text), "%u", id);
-		callsign = std::string(text);
+	if (id == 0xFFFFFFU) {
+		entry->clear();
+		entry->set(keyCALLSIGN, "ALL");
+		return;
 	}
 
-	return callsign;
+	if (m_table.lookup(id, entry)) {
+		LogDebug("FindWithName =%s %s", entry->get(keyCALLSIGN).c_str(), entry->get(keyFIRST_NAME).c_str());
+	} else {
+		entry->clear();
+
+		char text[10U];
+		::snprintf(text, sizeof(text), "%u", id);
+		entry->set(keyCALLSIGN, text);
+	}
+
+	return;
 }
 std::string CDMRLookup::find(unsigned int id)
 {
diff --git a/DMRLookup.h b/DMRLookup.h
index 1156270..c4e5d90 100644
--- a/DMRLookup.h
+++ b/DMRLookup.h
@@ -20,10 +20,9 @@
 #define	DMRLookup_H
 
 #include "Thread.h"
-#include "Mutex.h"
+#include "UserDB.h"
 
 #include <string>
-#include <unordered_map>
 
 class CDMRLookup : public CThread {
 public:
@@ -35,20 +34,17 @@ public:
 	virtual void entry();
 
 	std::string find(unsigned int id);
-	std::string findWithName(unsigned int id);
+	void findWithName(unsigned int id, class CUserDBentry *entry);
 
 	bool exists(unsigned int id);
 
 	void stop();
 
 private:
-	std::string                                   m_filename;
-	unsigned int                                  m_reloadTime;
-	std::unordered_map<unsigned int, std::string> m_table;
-	CMutex                                        m_mutex;
-	bool                                          m_stop;
-
-	bool load();
+	std::string     m_filename;
+	unsigned int    m_reloadTime;
+	class CUserDB   m_table;
+	bool            m_stop;
 };
 
 #endif
diff --git a/DMRSlot.cpp b/DMRSlot.cpp
index f42def4..1cfecab 100644
--- a/DMRSlot.cpp
+++ b/DMRSlot.cpp
@@ -1108,7 +1108,8 @@ void CDMRSlot::writeNetwork(const CDMRData& dmrData)
 		setShortLC(m_slotNo, dstId, flco, ACTIVITY_VOICE);
 		std::string src = m_lookup->find(srcId);
 		std::string dst = m_lookup->find(dstId);
-		std::string cn = m_lookup->findWithName(srcId);
+		class CUserDBentry cn;
+		m_lookup->findWithName(srcId, &cn);
 		m_display->writeDMR(m_slotNo, cn, flco == FLCO_GROUP, dst, "N");
 
 #if defined(DUMP_DMR)
@@ -1177,7 +1178,8 @@ void CDMRSlot::writeNetwork(const CDMRData& dmrData)
 			setShortLC(m_slotNo, dstId, m_netLC->getFLCO(), ACTIVITY_VOICE);
 			std::string src = m_lookup->find(srcId);
 			std::string dst = m_lookup->find(dstId);
-			std::string cn  = m_lookup->findWithName(srcId);
+			class CUserDBentry cn;
+			m_lookup->findWithName(srcId, &cn);
 
 			m_display->writeDMR(m_slotNo, cn, m_netLC->getFLCO() == FLCO_GROUP, dst, "N");
 
@@ -1373,7 +1375,8 @@ void CDMRSlot::writeNetwork(const CDMRData& dmrData)
 	
 			std::string src = m_lookup->find(srcId);
 			std::string dst = m_lookup->find(dstId);
-			std::string cn  = m_lookup->findWithName(srcId);
+			class CUserDBentry cn;
+			m_lookup->findWithName(srcId, &cn);
 
 			m_display->writeDMR(m_slotNo, cn, m_netLC->getFLCO() == FLCO_GROUP, dst, "N");
 
diff --git a/Display.cpp b/Display.cpp
index 84148b7..fcc7f59 100644
--- a/Display.cpp
+++ b/Display.cpp
@@ -151,6 +151,28 @@ void CDisplay::writeDMR(unsigned int slotNo, const std::string& src, bool group,
 	writeDMRInt(slotNo, src, group, dst, type);
 }
 
+void CDisplay::writeDMR(unsigned int slotNo, const class CUserDBentry& src, bool group, const std::string& dst, const char* type)
+{
+	assert(type != NULL);
+
+	if (slotNo == 1U) {
+		m_timer1.start();
+		m_mode1 = MODE_IDLE;
+	} else {
+		m_timer2.start();
+		m_mode2 = MODE_IDLE;
+	}
+
+	if (writeDMRIntEx(slotNo, src, group, dst, type) < 0) {
+		std::string src_str;
+
+		src_str = src.get(keyCALLSIGN);
+		if (!src.get(keyFIRST_NAME).empty())
+			src_str += " " + src.get(keyFIRST_NAME);
+		writeDMRInt(slotNo, src_str, group, dst, type);
+	}
+}
+
 void CDisplay::writeDMRRSSI(unsigned int slotNo, unsigned char rssi)
 {
 	if (rssi != 0U)
@@ -386,6 +408,11 @@ void CDisplay::writeDStarBERInt(float ber)
 {
 }
 
+int CDisplay::writeDMRIntEx(unsigned int slotNo, const class CUserDBentry& src, bool group, const std::string& dst, const char* type)
+{
+	return -1;	// not supported
+}
+
 void CDisplay::writeDMRRSSIInt(unsigned int slotNo, unsigned char rssi)
 {
 }
diff --git a/Display.h b/Display.h
index 65515be..2690d94 100644
--- a/Display.h
+++ b/Display.h
@@ -20,6 +20,7 @@
 #define	DISPLAY_H
 
 #include "Timer.h"
+#include "UserDBentry.h"
 
 #include <string>
 
@@ -48,6 +49,7 @@ public:
 	void clearDStar();
 
 	void writeDMR(unsigned int slotNo, const std::string& src, bool group, const std::string& dst, const char* type);
+	void writeDMR(unsigned int slotNo, const class CUserDBentry& src, bool group, const std::string& dst, const char* type);
 	void writeDMRRSSI(unsigned int slotNo, unsigned char rssi);
 	void writeDMRBER(unsigned int slotNo, float ber);
 	void writeDMRTA(unsigned int slotNo, unsigned char* talkerAlias, const char* type);
@@ -91,6 +93,7 @@ protected:
 	virtual void clearDStarInt() = 0;
 
 	virtual void writeDMRInt(unsigned int slotNo, const std::string& src, bool group, const std::string& dst, const char* type) = 0;
+	virtual int writeDMRIntEx(unsigned int slotNo, const class CUserDBentry& src, bool group, const std::string& dst, const char* type);
 	virtual void writeDMRRSSIInt(unsigned int slotNo, unsigned char rssi);
 	virtual void writeDMRTAInt(unsigned int slotNo, unsigned char* talkerAlias, const char* type);
 	virtual void writeDMRBERInt(unsigned int slotNo, float ber);