diff --git a/src/channel.cpp b/src/channel.cpp
index 217510c0..d88ec827 100755
--- a/src/channel.cpp
+++ b/src/channel.cpp
@@ -263,6 +263,9 @@ void CChannel::SetNetwInBlSiFact ( const int iNewBlockSizeFactor )
 	// initial value for connection time out counter
 	iConTimeOutStartVal = ( CON_TIME_OUT_SEC_MAX * 1000 ) /
 		( iNewBlockSizeFactor * MIN_BLOCK_DURATION_MS );
+
+	// socket buffer must be adjusted
+	SetSockBufSize ( GetSockBufSize() );
 }
 
 void CChannel::SetNetwOutBlSiFact ( const int iNewBlockSizeFactor )
@@ -298,6 +301,8 @@ void CChannel::SetSockBufSize ( const int iNumBlocks )
 	/* this opperation must be done with mutex */
 	Mutex.lock ();
 	{
+		iCurSockBufSize = iNumBlocks;
+
 		// the idea of setting the jitter buffer is as follows:
 		// The network block size is a multiple of the internal minimal
 		// block size. Therefore, the minimum jitter buffer size must be
@@ -305,17 +310,11 @@ void CChannel::SetSockBufSize ( const int iNumBlocks )
 		// The actual jitter compensation are then the additional blocks of
 		// the internal block size, which is set with SetSockBufSize
 		SockBuf.Init ( MIN_BLOCK_SIZE_SAMPLES,
-			iNumBlocks + NET_BLOCK_SIZE_FACTOR );
+			iNumBlocks + iCurNetwInBlSiFact );
 	}
 	Mutex.unlock ();
 }
 
-int CChannel::GetSockBufSize()
-{
-	// see comment in SetSockBufSize function
-	return SockBuf.GetSize() - NET_BLOCK_SIZE_FACTOR;
-}
-
 void CChannel::OnJittBufSizeChange ( int iNewJitBufSize )
 {
 // TEST
@@ -328,15 +327,10 @@ qDebug ( "new jitter buffer size: %d", iNewJitBufSize );
 // network buffer size factor
 void CChannel::SetNetwBufSizeFact ( const int iNetNetwBlSiFact )
 {
-	/* this opperation must be done with mutex */
-	Mutex.lock ();
-	{
-		iCurNetwBlSiFact = iNetNetwBlSiFact;
+	iCurNetwBlSiFact = iNetNetwBlSiFact;
 
-		SetNetwInBlSiFact ( iNetNetwBlSiFact );
-		SetNetwOutBlSiFact ( iNetNetwBlSiFact );
-	}
-	Mutex.unlock ();
+	SetNetwInBlSiFact ( iNetNetwBlSiFact );
+	SetNetwOutBlSiFact ( iNetNetwBlSiFact );
 }
 
 void CChannel::OnNetwBlSiFactChange ( int iNewNetwBlSiFact )
@@ -411,7 +405,10 @@ for ( int i = 0; i < iCurNetwInBlSiFact * MIN_BLOCK_SIZE_SAMPLES; i++ ) {
 	else
 	{
 		// only use protocol data if channel is connected
-		if ( IsConnected() )
+
+// must be disabled to be able to receive network buffer size factor changes
+//		if ( IsConnected() )
+
 		{
 			// this seems not to be an audio block, parse the message
 			if ( Protocol.ParseMessage ( vecbyData, iNumBytes ) )
@@ -474,6 +471,13 @@ CVector<unsigned char> CChannel::PrepSendPacket(const CVector<short>& vecsNPacke
 		/* a packet is ready, compress audio */
 		vecbySendBuf.Init ( iAudComprSizeOut );
 		vecbySendBuf = AudioCompressionOut.Encode ( ConvBuf.Get () );
+	}
+
+	// if we are not connected, send network buffer size factor so that the
+	// server is able to process our audio packets
+	if ( !IsConnected() )
+	{
+		Protocol.CreateNetwBlSiFactMes ( iCurNetwBlSiFact );
 	}
 
 	return vecbySendBuf;
diff --git a/src/channel.h b/src/channel.h
index 04e54c62..5cbcc5d1 100755
--- a/src/channel.h
+++ b/src/channel.h
@@ -81,7 +81,7 @@ public:
 	CHostAddress GetAddress () { return InetAddr; }
 
 	void SetSockBufSize ( const int iNumBlocks );
-	int GetSockBufSize();
+	int GetSockBufSize() { return iCurSockBufSize; }
 
 	void SetNetwBufSizeFact ( const int iNetNetwBlSiFact );
 	int GetNetwBufSizeFact() { return iCurNetwBlSiFact; }
@@ -126,6 +126,7 @@ protected:
 
 	/* network jitter-buffer */
 	CNetBuf				SockBuf;
+	int					iCurSockBufSize;
 
 	/* network output conversion buffer */
 	CConvBuf			ConvBuf;
diff --git a/src/client.cpp b/src/client.cpp
index 7e24455d..a91018ae 100755
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -53,6 +53,15 @@ for ( int i = 0; i < vecMessage.Size (); i++ ) {
 	// send it through the network
 	Socket.SendPacket ( vecbyDataConv, Channel.GetAddress () );
 }
+
+void CClient::OnReqJittBufSize()
+{
+	Channel.CreateJitBufMes ( Channel.GetSockBufSize() );
+
+// FIXME: we set the network buffer size factor here, too -> in the
+// future a separate request function for this parameter should be created
+	Channel.CreateNetwBlSiFactMes ( Channel.GetNetwBufSizeFact() );
+}
 
 bool CClient::SetServerAddr(QString strNAddr)
 {
diff --git a/src/client.h b/src/client.h
index 3f282e85..294a70de 100755
--- a/src/client.h
+++ b/src/client.h
@@ -157,7 +157,7 @@ protected:
 
 public slots:
 	void OnSendProtMessage ( CVector<uint8_t> vecMessage );
-	void OnReqJittBufSize() { Channel.CreateJitBufMes ( Channel.GetSockBufSize() ); }
+	void OnReqJittBufSize();
 };
 
 
diff --git a/src/llconclientdlgbase.ui b/src/llconclientdlgbase.ui
index fafcb72c..a9eb4cb6 100755
--- a/src/llconclientdlgbase.ui
+++ b/src/llconclientdlgbase.ui
@@ -11,8 +11,8 @@
         <rect>
             <x>0</x>
             <y>0</y>
-            <width>890</width>
-            <height>288</height>
+            <width>897</width>
+            <height>287</height>
         </rect>
     </property>
     <property stdset="1">
@@ -789,6 +789,42 @@
                         <enum>Both</enum>
                     </property>
                 </widget>
+                <widget>
+                    <class>QLabel</class>
+                    <property stdset="1">
+                        <name>name</name>
+                        <cstring>TextLabel2_2</cstring>
+                    </property>
+                    <property stdset="1">
+                        <name>text</name>
+                        <string>Check Ping</string>
+                    </property>
+                    <property stdset="1">
+                        <name>alignment</name>
+                        <set>AlignCenter</set>
+                    </property>
+                    <property>
+                        <name>hAlign</name>
+                    </property>
+                </widget>
+                <widget>
+                    <class>QLabel</class>
+                    <property stdset="1">
+                        <name>name</name>
+                        <cstring>TextLabel2_3</cstring>
+                    </property>
+                    <property stdset="1">
+                        <name>text</name>
+                        <string>Time!</string>
+                    </property>
+                    <property stdset="1">
+                        <name>alignment</name>
+                        <set>AlignCenter</set>
+                    </property>
+                    <property>
+                        <name>hAlign</name>
+                    </property>
+                </widget>
             </vbox>
         </widget>
         <widget>