diff --git a/src/port.h b/src/port.h
--- a/src/port.h
+++ b/src/port.h
@@ -23,34 +23,55 @@
 
 #include "profile.h"
 
+#include <pulse/def.h>
+
 namespace QPulseAudio
 {
 
 class Q_DECL_EXPORT Port : public Profile
 {
     Q_OBJECT
-    Q_PROPERTY(bool available READ isAvailable NOTIFY availableChanged)
+    Q_PROPERTY(Availability availability READ availability NOTIFY availabilityChanged)
 public:
+    enum Availability {
+        Unknown,
+        Available,
+        Unavailable
+    };
+    Q_ENUM(Availability)
+
     Port(QObject *parent);
     virtual ~Port();
 
     template<typename PAInfo>
     void setInfo(const PAInfo *info)
     {
         Profile::setInfo(info);
-        if (m_isAvailable != info->available) {
-            m_isAvailable = info->available;
-            emit availableChanged();
+
+        Availability newAvailability;
+        switch (info->available) {
+        case PA_PORT_AVAILABLE_NO:
+            newAvailability = Unavailable;
+            break;
+        case PA_PORT_AVAILABLE_YES:
+            newAvailability = Available;
+            break;
+        default:
+            newAvailability = Unknown;
+        }
+        if (m_availability != newAvailability) {
+            m_availability = newAvailability;
+            emit availabilityChanged();
         }
     }
 
-    bool isAvailable() const;
+    Availability availability() const;
 
 signals:
-    void availableChanged();
+    void availabilityChanged();
 
 private:
-    bool m_isAvailable;
+    Availability m_availability;
 };
 
 } // QPulseAudio
diff --git a/src/port.cpp b/src/port.cpp
--- a/src/port.cpp
+++ b/src/port.cpp
@@ -25,17 +25,17 @@
 
 Port::Port(QObject *parent)
     : Profile(parent)
-    , m_isAvailable(false)
+    , m_availability(Unknown)
 {
 }
 
 Port::~Port()
 {
 }
 
-bool Port::isAvailable() const
+Port::Availability Port::availability() const
 {
-    return m_isAvailable;
+    return m_availability;
 }
 
 } // QPulseAudio
diff --git a/src/qml/plugin.cpp b/src/qml/plugin.cpp
--- a/src/qml/plugin.cpp
+++ b/src/qml/plugin.cpp
@@ -28,6 +28,7 @@
 #include "source.h"
 #include "context.h"
 #include "modulemanager.h"
+#include "port.h"
 
 #include "globalactioncollection.h"
 #include "volumeosd.h"
@@ -53,6 +54,7 @@
     qmlRegisterType<QPulseAudio::ModuleManager>(uri, 0, 1, "ModuleManager");
     qmlRegisterType<QPulseAudio::SourceOutputModel>(uri, 0, 1, "SourceOutputModel");
     qmlRegisterType<QPulseAudio::StreamRestoreModel>(uri, 0, 1, "StreamRestoreModel");
+    qmlRegisterUncreatableType<QPulseAudio::Port>(uri, 0, 1, "Port", QString());
     qmlRegisterType<GlobalAction>(uri, 0, 1, "GlobalAction");
     qmlRegisterType<GlobalActionCollection>(uri, 0, 1, "GlobalActionCollection");
     qmlRegisterType<VolumeOSD>(uri, 0, 1, "VolumeOSD");