diff --git a/ProxyChannel.cxx b/ProxyChannel.cxx
index b2d5d9b0..39d53a55 100644
--- a/ProxyChannel.cxx
+++ b/ProxyChannel.cxx
@@ -1055,7 +1055,6 @@ class LogicalChannel {
 	LogicalChannel(WORD flcn = 0) : channelNumber(flcn), port(0), used(false) { }
 	virtual ~LogicalChannel() { }
 
-	bool IsUsed() const { return used; }
 	bool Compare(WORD lcn) const { return channelNumber == lcn; }
 	WORD GetPort() const { return port; }
 	WORD GetChannelNumber() const { return channelNumber; }
@@ -10330,7 +10329,7 @@ MultiplexedRTPHandler::MultiplexedRTPHandler() : Singleton<MultiplexedRTPHandler
 		m_reader = new MultiplexedRTPReader();
 		PTime now;
         m_cleanupTimer = Toolkit::Instance()->GetTimerManager()->RegisterTimer(this, &MultiplexedRTPHandler::SessionCleanup, now, 30);
-        m_deleteDelay.SetMilliSeconds(30 * 1000); // wait 30 sec. before really deleting a deleted session
+        m_deleteDelay.SetMilliSeconds(WAIT_DELETE_AFTER_DISCONNECT * 1000); // wait 30 sec. before really deleting a deleted session
 	} else {
 		m_reader = NULL;
 		m_cleanupTimer = GkTimerManager::INVALID_HANDLE;
@@ -10524,7 +10523,7 @@ bool MultiplexedRTPHandler::HandlePacket(DWORD receivedMultiplexID, const IPAndP
 	}
 	if (!isRTCP) {
         // no warning for RTCP, probably a Polycom RTCP packet with missing multiplex ID
-        PTRACE(3, "RTP\tWarning: Didn't find a channel for receivedMultiplexID " << receivedMultiplexID << " from " << AsString(fromAddress));
+        PTRACE(7, "RTP\tWarning: Didn't find a channel for receivedMultiplexID " << receivedMultiplexID << " from " << AsString(fromAddress));
     }
 	return false;
 }
@@ -14105,7 +14104,7 @@ bool H245ProxyHandler::HandleCloseLogicalChannel(H245_CloseLogicalChannel & clc,
 			second->RemoveLogicalChannel((WORD)clc.m_forwardLogicalChannelNumber);
 	}
 #ifdef HAS_H46018
-	call->RemoveKeepAlives(clc.m_forwardLogicalChannelNumber);
+	call->RemoveRTPKeepAlives(clc.m_forwardLogicalChannelNumber);
 #endif
 	return false; // nothing changed
 }
diff --git a/RasTbl.cxx b/RasTbl.cxx
index 64944576..3ea1068b 100644
--- a/RasTbl.cxx
+++ b/RasTbl.cxx
@@ -2879,7 +2879,7 @@ CallRec::~CallRec()
 {
 	PTRACE(3, "Gk\tDelete Call No. " << m_CallNumber);
 #ifdef HAS_H46018
-	RemoveKeepAllAlives();
+	RemoveAllRTPKeepAlives();
 #endif
     delete(m_newSetupInternalAliases);
 
@@ -5074,13 +5074,13 @@ void CallRec::StartRTCPKeepAlive(unsigned flcn, int RTCPOSSocket)
 	}
 }
 
-void CallRec::RemoveKeepAlives(unsigned flcn)
+void CallRec::RemoveRTPKeepAlives(unsigned flcn)
 {
 	m_RTPkeepalives.erase(flcn);
 	m_RTCPkeepalives.erase(flcn);
 }
 
-void CallRec::RemoveKeepAllAlives()
+void CallRec::RemoveAllRTPKeepAlives()
 {
 	m_RTPkeepalives.clear();
 	m_RTCPkeepalives.clear();
@@ -5691,12 +5691,11 @@ void CallTable::RemoveCall(const callptr & call)
 		InternalRemovePtr(call.operator->());
 }
 
-bool CallTable::InternalRemovePtr(CallRec *call)
+void CallTable::InternalRemovePtr(CallRec *call)
 {
 	PTRACE(6, "GK\tRemoving callptr: " << AsString(call->GetCallIdentifier().m_guid));
 	WriteLock lock(listLock);
 	InternalRemove(find(CallList.begin(), CallList.end(), call));
-	return true; // useless, workaround for VC
 }
 
 void CallTable::RemoveFailedLeg(const callptr & call)
diff --git a/RasTbl.h b/RasTbl.h
index 7786dec3..a05eeadb 100644
--- a/RasTbl.h
+++ b/RasTbl.h
@@ -50,6 +50,7 @@ const DWORD INVALID_MULTIPLEX_ID = 0;
 const BYTE GNUGK_KEEPALIVE_RTP_PAYLOADTYPE = 116;	// must at least be 1 less than MAX_DYNAMIC_PAYLOAD_TYPE
 const BYTE MIN_DYNAMIC_PAYLOAD_TYPE = 96;
 const BYTE MAX_DYNAMIC_PAYLOAD_TYPE = 127;
+const unsigned WAIT_DELETE_AFTER_DISCONNECT = 30;   // time to wait after disconnect before deleting call object
 
 enum PortType { RASPort=1, Q931Port=2, H245Port=3, RTPPort=4, T120Port=5, RadiusPort=6, StatusPort=7 };
 enum PortAction { PortOpen=1, PortClose=2 };
@@ -929,8 +930,6 @@ class CallRec {
 	bool CompareSigAdr(const H225_TransportAddress *adr) const;
 	bool CompareSigAdrIgnorePort(const H225_TransportAddress *adr) const;
 
-	bool IsUsed() const { return (m_usedCount != 0); }
-
 	/** @return
 		true if the call has been connected - a Connect message
 		has been received in gk routed signaling or the call has been admitted
@@ -957,6 +956,7 @@ class CallRec {
 
 	void Lock();
 	void Unlock();
+	bool IsUsed() const;
 
 	/** @return
 		Q.931 ReleaseComplete cause code for the call.
@@ -1432,8 +1432,8 @@ class CallRec {
 	void StartRTPKeepAlive(unsigned flcn, int RTPOSSocket);
 	void AddRTCPKeepAlive(unsigned flcn, const H245_UnicastAddress & keepAliveRTCPAddr, unsigned keepAliveInterval, DWORD multiplexID);
 	void StartRTCPKeepAlive(unsigned flcn, int RTCPOSSocket);
-	void RemoveKeepAlives(unsigned flcn);
-	void RemoveKeepAllAlives();
+	void RemoveRTPKeepAlives(unsigned flcn);
+	void RemoveAllRTPKeepAlives();
 
 	void SetSessionMultiplexDestination(WORD session, void * openedBy, bool isRTCP, const IPAndPortAddress & toAddress, H46019Side side);
 	bool IgnoreSignaledIPs() const { return m_ignoreSignaledIPs; }
@@ -1813,7 +1813,7 @@ class CallTable : public Singleton<CallTable>
 	        return callptr((Iter != CallList.end()) ? *Iter : 0);
 	}
 
-	bool InternalRemovePtr(CallRec *call);
+	void InternalRemovePtr(CallRec *call);
 	void InternalRemove(iterator);
 	void InternalRemoveFailedLeg(iterator);
 
@@ -2125,6 +2125,18 @@ inline void CallRec::Unlock()
 	--m_usedCount;
 }
 
+inline bool CallRec::IsUsed() const {
+    if (m_usedCount != 0)
+        return true;
+    // also consider all calls that ever connected as used until 30 sec after disconnect (due to late arriving RTP)
+    if ((m_disconnectTime > 0) && (time(NULL) - m_disconnectTime > WAIT_DELETE_AFTER_DISCONNECT))
+        return true;
+    if ((m_connectTime > 0) && (time(NULL) - m_connectTime > WAIT_DELETE_AFTER_DISCONNECT))
+        return true;
+    return false;
+}
+
+
 inline bool CallRec::CompareCallId(const H225_CallIdentifier *CallId) const
 {
 	return (m_callIdentifier == *CallId);