diff --git a/modules/server/sigtransport.cpp b/modules/server/sigtransport.cpp
index 4d1d2faa..ddce01c0 100644
--- a/modules/server/sigtransport.cpp
+++ b/modules/server/sigtransport.cpp
@@ -113,14 +113,15 @@ class TReader : public TransportWorker, public Mutex
 {
 public:
     inline TReader()
-	: Mutex(true,"TReader"), m_canSend(true), m_isSending(false)
+	: Mutex(true,"TReader"),
+	  m_sending(true,"TReader::sending"), m_canSend(true)
 	{ }
     virtual ~TReader();
     virtual void listen(int maxConn) = 0;
     virtual bool sendMSG(const DataBlock& header, const DataBlock& msg, int streamId = 0) = 0;
     virtual void setSocket(Socket* s) = 0;
+    Mutex m_sending;
     bool m_canSend;
-    bool m_isSending;
 };
 
 class Transport : public SIGTransport
@@ -197,6 +198,7 @@ public:
     virtual void setSocket(Socket* s);
     virtual void listen(int maxConn)
 	{ }
+    virtual bool sendBuffer(int streamId = 0);
 private:
     Transport* m_transport;
     Socket* m_socket;
@@ -250,6 +252,13 @@ static const TokenDict s_transType[] = {
     { 0, 0 }
 };
 
+static const TokenDict s_transStatus[] = {
+    { "up", Transport::Up },
+    { "initiating", Transport::Initiating },
+    { "down", Transport::Down },
+    { 0, 0 }
+};
+
 static void resolveAddress(const String& addr, String& ip, int& port)
 {
     ObjList* o = addr.split(':');
@@ -344,7 +353,7 @@ bool ListenerThread::init(const NamedList& param)
 	Debug(DebugWarn,"Unable to bind to %s:%u %s",addr.host().c_str(),addr.port(),strerror(errno));
 	return false;
     } else
-	DDebug("ListenerThread",DebugAll,"Socket bind to %s:%u",
+	DDebug("ListenerThread",DebugAll,"Socket bound to %s:%u",
 	    addr.host().c_str(),addr.port());
     if (multi && !addAddress(param))
 	return false;
@@ -409,7 +418,7 @@ bool ListenerThread::addAddress(const NamedList &param)
 	DDebug("ListenerThread",DebugNote,"Failed to bindx sctp socket [%p] %s",s,strerror(errno));
 	return false;
     } else
-	Debug(DebugNote,"Socket binded to %d auxiliar addresses",o.count());
+	Debug(DebugNote,"Socket bound to %d auxiliary addresses",o.count());
     return true;
 }
 
@@ -770,7 +779,7 @@ bool Transport::connectSocket()
 	    delete s;
 	    return false;
 	} else
-	     Debug(DebugNote,"Socket conected to %d addresses",o.count());
+	     Debug(this,DebugNote,"Socket conected to %d addresses",o.count());
     }
     m_reader->setSocket(sock);
     setStatus(Up);
@@ -781,6 +790,8 @@ void Transport::setStatus(int status)
 {
     if (m_state == status)
 	return;
+    DDebug(this,DebugInfo,"State change: %s -> %s [%p]",
+	lookup(m_state,s_transStatus,"?"),lookup(status,s_transStatus,"?"),this);
     m_state = status;
     m_reader->m_canSend = true;
     notifyLayer((status == Up) ? SignallingInterface::LinkUp : SignallingInterface::LinkDown);
@@ -789,14 +800,16 @@ void Transport::setStatus(int status)
 u_int32_t Transport::getMsgLen(unsigned char* buf)
 {
     return ((unsigned int)buf[4] << 24) | ((unsigned int)buf[5] << 16) | 
-		((unsigned int)buf[6] << 8) | (unsigned int)buf[7];
+	((unsigned int)buf[6] << 8) | (unsigned int)buf[7];
 }
 
 
 bool Transport::transmitMSG(const DataBlock& header, const DataBlock& msg, int streamId)
 {
-    if (!m_reader)
+    if (!m_reader) {
+	DDebug(this,DebugMild,"Cannot send message, no reader set [%p]",this);
 	return false;
+    }
     bool ret = m_reader->sendMSG(header,msg,streamId);
     return ret;
 }
@@ -884,50 +897,62 @@ void StreamReader::setSocket(Socket* s)
 
 bool StreamReader::sendMSG(const DataBlock& header, const DataBlock& msg, int streamId)
 {
-    if (!m_canSend)
+    if (!m_canSend) {
+	DDebug(m_transport,DebugNote,"Cannot send message at this time");
 	return false;
-    m_isSending = true;
+    }
+    bool ret = false;
+    Lock mylock(m_sending);
     if (((m_sendBuffer.length() + msg.length()) + header.length()) < MAX_BUF_SIZE) {
 	m_sendBuffer += header;
 	m_sendBuffer += msg;
+	ret = true;
     }
     else
-	Debug(m_transport,DebugAll,"Buffer Overrun");
-    while (m_socket && m_sendBuffer.length()) {
-	bool sendOk = false, error = false;
-	if (m_socket->select(0,&sendOk,&error,Thread::idleUsec())) {
-	    if (error) {
-		DDebug(m_transport,DebugAll,"Error detected. %s",strerror(errno));
-		break;
-	    }
-	    if (!sendOk)
-		break;
-	    int len = 0;
-	    if (m_transport->transType() == Transport::Sctp) {
-		SctpSocket* s = static_cast<SctpSocket*>(m_socket);
-		if (!s) {
-		    DDebug(m_transport,DebugGoOn,"Sctp conversion failed");
-		    break;
-		}
-		int flags = 0;
-		len = s->sendMsg(m_sendBuffer.data(),m_sendBuffer.length(),streamId,flags);
-	    }
-	    else
-		len = m_socket->send(m_sendBuffer.data(),m_sendBuffer.length());
-	    if (len <= 0)
-		break;
-	    m_sendBuffer.cut(-len);
-	}
-	break;
+	Debug(m_transport,DebugWarn,"Buffer Overrun");
+    return sendBuffer(streamId) && ret;
+}
+
+bool StreamReader::sendBuffer(int streamId)
+{
+    if (!m_socket)
+	return needConnect();
+    if (m_sendBuffer.null())
+	return true;
+    bool sendOk = false, error = false;
+    if (!m_socket->select(0,&sendOk,&error,Thread::idleUsec()) || error) {
+	DDebug(m_transport,DebugAll,"Error detected. %s",strerror(errno));
+	return false;
     }
-    m_isSending = false;
-    return (m_sendBuffer.length() == 0);
+    if (!sendOk)
+	return true;
+    int len = 0;
+    if (m_transport->transType() == Transport::Sctp) {
+	SctpSocket* s = static_cast<SctpSocket*>(m_socket);
+	if (!s) {
+	    DDebug(m_transport,DebugGoOn,"Sctp conversion failed");
+	    return false;
+	}
+	int flags = 0;
+	len = s->sendMsg(m_sendBuffer.data(),m_sendBuffer.length(),streamId,flags);
+    }
+    else
+	len = m_socket->send(m_sendBuffer.data(),m_sendBuffer.length());
+    if (len <= 0) {
+	DDebug(m_transport,DebugAll,"Send error detected. %s",strerror(errno));
+	return false;
+    }
+    m_sendBuffer.cut(-len);
+    return true;
 }
 
 bool StreamReader::readData()
 {
     if (!m_socket)
 	return false;
+    m_sending.lock();
+    sendBuffer();
+    m_sending.unlock();
     bool readOk = false, error = false;
     if (!m_socket->select(&readOk,0,&error,Thread::idleUsec()))
 	return false;
@@ -953,9 +978,10 @@ bool StreamReader::readData()
 		}
 		DDebug(m_transport,DebugWarn,"Connection down [%p] %d",m_socket, flags);
 		m_transport->setStatus(Transport::Down);
-		while (m_isSending)
+		while (!m_sending.lock(Thread::idleUsec()))
 		    Thread::yield();
 		m_canSend = false;
+		m_sending.unlock();
 		m_socket->terminate();
 		if (m_transport->listen())
 		    stop();
@@ -1055,11 +1081,13 @@ void MessageReader::setSocket(Socket* s)
 
 bool MessageReader::sendMSG(const DataBlock& header, const DataBlock& msg, int streamId)
 {
-    if (!m_canSend)
+    if (!m_canSend) {
+	DDebug(m_transport,DebugNote,"Cannot send message at this time");
 	return false;
+    }
     bool sendOk = false, error = false;
     bool ret = false;
-    m_isSending = true;
+    Lock mylock(m_sending);
     while (m_socket && m_socket->select(0,&sendOk,&error,Thread::idleUsec())) {
 	if (error) {
 	    DDebug(m_transport,DebugAll,"Send error detected. %s",strerror(errno));
@@ -1099,7 +1127,6 @@ bool MessageReader::sendMSG(const DataBlock& header, const DataBlock& msg, int s
 	DDebug(m_transport,DebugMild,"Error sending message %d %d %s",len,totalLen,strerror(errno));
 	break;
     }
-    m_isSending = false;
     return ret;
 }