diff --git a/engine/Channel.cpp b/engine/Channel.cpp
index b0fcc29e..02d84568 100644
--- a/engine/Channel.cpp
+++ b/engine/Channel.cpp
@@ -178,7 +178,7 @@ Message* Channel::message(const char* name, bool minimal) const
     return msg;
 }
 
-bool Channel::startRouter(Message* msg) const
+bool Channel::startRouter(Message* msg)
 {
     if (!msg)
 	return false;
@@ -190,6 +190,10 @@ bool Channel::startRouter(Message* msg) const
     }
     else
 	delete msg;
+    callReject("failure","Internal server error");
+    // dereference and die if the channel is dynamic
+    if (m_driver && m_driver->varchan())
+	deref();
     return false;
 }
 
@@ -278,7 +282,6 @@ DataEndpoint* Channel::setEndpoint(const char* type)
 	dat = new DataEndpoint(this,type);
 	if (m_peer)
 	    dat->connect(m_peer->getEndpoint(type));
-//	dat->ref();
     }
     return dat;
 }
@@ -329,7 +332,7 @@ TokenDict Module::s_messages[] = {
     { 0, 0 }
 };
 
-unsigned int Module::s_delay = 2;
+unsigned int Module::s_delay = 5;
 
 const char* Module::messageName(int id)
 {
@@ -382,6 +385,7 @@ void Module::initialize()
 
 void Module::setup()
 {
+    Debug(DebugAll,"Module::setup()");
     if (m_init)
 	return;
     m_init = true;
@@ -492,7 +496,9 @@ bool Module::setDebug(Message& msg, const String& target)
 
 
 Driver::Driver(const char* name, const char* type)
-    : Module(name,type), m_init(false), m_routing(0), m_routed(0), m_nextid(0)
+    : Module(name,type),
+      m_init(false), m_varchan(true),
+      m_routing(0), m_routed(0), m_nextid(0)
 {
     m_prefix << name << "/";
 }
@@ -511,6 +517,7 @@ void Driver::initialize()
 
 void Driver::setup(const char* prefix, bool minimal)
 {
+    Debug(DebugAll,"Driver::setup('%s',%d)",prefix,minimal);
     Module::setup();
     if (m_init)
 	return;
@@ -712,7 +719,8 @@ bool Router::route()
     m_driver->lock();
     Channel* chan = m_driver->find(m_id);
     if (chan) {
-	// this will keep it referenced
+	// this will keep it referenced even if message user data is changed
+	chan->ref();
 	m_msg->userData(chan);
 	chan->status("routed");
     }
@@ -728,16 +736,18 @@ bool Router::route()
 	m_msg->setParam("callto",m_msg->retValue());
 	m_msg->retValue().clear();
 	ok = Engine::dispatch(m_msg);
-	if (ok) {
+	if (ok)
 	    chan->callAccept(*m_msg);
-	    chan->deref();
-	}
 	else
 	    chan->callReject("noconn","Could not connected to target");
     }
     else
 	chan->callReject("noroute","No route to call target");
 
+    chan->deref();
+    // dereference again if the channel is dynamic
+    if (m_driver->varchan())
+	chan->deref();
     return ok;
 }
 
diff --git a/modules/iaxchan.cpp b/modules/iaxchan.cpp
index 51788ed0..1b775f5b 100644
--- a/modules/iaxchan.cpp
+++ b/modules/iaxchan.cpp
@@ -655,6 +655,7 @@ void IAXConnection::callAccept(Message& msg)
     Debug(DebugAll,"IAXConnection::callAccept() [%p]",this);
     startAudio(m_format,m_capab);
     Channel::callAccept(msg);
+    deref();
 }
 
 void IAXConnection::callReject(const char* error, const char* reason)
diff --git a/modules/libypri.cpp b/modules/libypri.cpp
index c863155b..987ef9c6 100644
--- a/modules/libypri.cpp
+++ b/modules/libypri.cpp
@@ -877,6 +877,7 @@ bool PriDriver::s_init = true;
 PriDriver::PriDriver(const char* name)
     : Driver(name,"fixchans")
 {
+    varchan(false);
     if (s_init) {
 	s_init = false;
 	for (unsigned int c = 0; c <= 255; c++) {
@@ -948,6 +949,20 @@ bool PriDriver::isBusy() const
     return false;
 }
 
+void PriDriver::statusParams(String& str)
+{
+    Driver::statusParams(str);
+    String sp;
+    const ObjList *l = &m_spans;
+    for (; l; l=l->next()) {
+	PriSpan *s = static_cast<PriSpan *>(l->get());
+	if (s)
+	    sp.append(String(s->chans()),"|");
+    }
+    if (sp)
+	str.append("spanlen=",",") << sp;
+}
+
 void PriDriver::netParams(Configuration& cfg, const String& sect, int chans, int* netType, int* swType, int* dChan)
 {
     if (netType)
diff --git a/modules/libypri.h b/modules/libypri.h
index 28f6dafc..c505879c 100644
--- a/modules/libypri.h
+++ b/modules/libypri.h
@@ -205,6 +205,7 @@ public:
 	{ return s_bitswap[v]; }
 protected:
     PriDriver(const char* name);
+    void statusParams(String& str);
 private:
     ObjList m_spans;
     static u_int8_t s_bitswap[256];
diff --git a/yatephone.h b/yatephone.h
index f5609eb4..033962f0 100644
--- a/yatephone.h
+++ b/yatephone.h
@@ -1082,12 +1082,12 @@ public:
 	{ disconnect(false,reason); }
 
     /**
-     * Start a routing thread for this channel
+     * Start a routing thread for this channel, dereference dynamic channels
      * @param msg Pointer to message to route, typically a "call.route", will be
      *  destroyed after routing fails or completes
      * @return True if routing thread started successfully, false if failed
      */
-    bool startRouter(Message* msg) const;
+    bool startRouter(Message* msg);
 
     /**
      * Get a data endpoint of this object
@@ -1191,6 +1191,7 @@ class YATE_API Driver : public Module
 
 private:
     bool m_init;
+    bool m_varchan;
     String m_prefix;
     ObjList m_chans;
     int m_routing;
@@ -1212,6 +1213,13 @@ public:
     inline const String& prefix() const
 	{ return m_prefix; }
 
+    /**
+     * Check if this driver is for dynamic (variable number) channels
+     * @return True if the channels are dynamic, false for fixed
+     */
+    inline bool varchan() const
+	{ return m_varchan; }
+
     /**
      * Get the list of channels of this driver
      * @return A reference to the channel list
@@ -1323,6 +1331,13 @@ protected:
      */
     virtual bool setDebug(Message& msg, const String& target);
 
+    /**
+     * Set if this driver is for dynamic (variable number) channels
+     * @param variable True if the channels are dynamic, false for fixed
+     */
+    inline void varchan(bool variable)
+	{ m_varchan = variable; }
+
 private:
     Driver(); // no default constructor please
 };