diff --git a/src/knx/application_layer.cpp b/src/knx/application_layer.cpp
index 3d96559..321942a 100644
--- a/src/knx/application_layer.cpp
+++ b/src/knx/application_layer.cpp
@@ -175,7 +175,10 @@ void ApplicationLayer::connectIndication(uint16_t tsap)
 
 void ApplicationLayer::connectConfirm(uint16_t destination, uint16_t tsap, bool status)
 {
-
+    if (status)
+        _connectedTsap = tsap;
+    else
+        _connectedTsap = -1;
 }
 
 void ApplicationLayer::disconnectIndication(uint16_t tsap)
diff --git a/src/knx/transport_layer.cpp b/src/knx/transport_layer.cpp
index eb00d64..e63f624 100644
--- a/src/knx/transport_layer.cpp
+++ b/src/knx/transport_layer.cpp
@@ -666,6 +666,7 @@ void TransportLayer::A12(uint16_t destination, Priority priority)
     CemiFrame frame(0);
     TPDU& tpdu = frame.tpdu();
     tpdu.type(Connect);
+    _networkLayer->dataIndividualRequest(AckRequested, destination, NetworkLayerParameter, priority, tpdu);
     _seqNoRecv = 0;
     _seqNoSend = 0;
     enableConnectionTimeout();