diff --git a/src/blackcore/context/contextaudio.h b/src/blackcore/context/contextaudio.h
index 7d2039407..f9e2cf902 100644
--- a/src/blackcore/context/contextaudio.h
+++ b/src/blackcore/context/contextaudio.h
@@ -190,6 +190,15 @@ namespace BlackCore
             //! \copydoc IContextAudio::parseCommandLine
             virtual bool parseCommandLine(const QString &commandLine, const BlackMisc::CIdentifier &originator) override;
 
+            //! Register a device on a machine (for core/GUI it will return all known devices on all machines)
+            virtual void registerDevices(const BlackMisc::Audio::CAudioDeviceInfoList &devices) = 0;
+
+            //! Unregister devices
+            virtual void unRegisterDevices(const BlackMisc::Audio::CAudioDeviceInfoList &devices) = 0;
+
+            //! All registered devices
+            virtual BlackMisc::Audio::CAudioDeviceInfoList getRegisteredDevices() const = 0;
+
             // ------------- DBus ---------------
 
         private:
diff --git a/src/blackcore/context/contextaudioimpl.cpp b/src/blackcore/context/contextaudioimpl.cpp
index e12937df9..70c7cb311 100644
--- a/src/blackcore/context/contextaudioimpl.cpp
+++ b/src/blackcore/context/contextaudioimpl.cpp
@@ -15,6 +15,7 @@
 
 
 using namespace BlackMisc;
+using namespace BlackMisc::Audio;
 
 namespace BlackCore
 {
@@ -31,5 +32,21 @@ namespace BlackCore
             return this;
         }
 
+        void CContextAudio::registerDevices(const CAudioDeviceInfoList &devices)
+        {
+            if (devices.isEmpty()) { return; }
+            m_registeredDevices.registerDevices(devices);
+        }
+
+        void CContextAudio::unRegisterDevices(const CAudioDeviceInfoList &devices)
+        {
+            m_registeredDevices.unRegisterDevices(devices);
+        }
+
+        CAudioDeviceInfoList CContextAudio::getRegisteredDevices() const
+        {
+            return m_registeredDevices;
+        }
+
     } // namespace
 } // namespace
diff --git a/src/blackcore/context/contextaudioimpl.h b/src/blackcore/context/contextaudioimpl.h
index ce689b4e2..7c3bd422f 100644
--- a/src/blackcore/context/contextaudioimpl.h
+++ b/src/blackcore/context/contextaudioimpl.h
@@ -45,7 +45,9 @@ namespace BlackCore
             // Interface implementations
             //! \publicsection
             //! @{
-            //  ---- FUNCTIONS GO HERE ----
+            virtual void registerDevices(const BlackMisc::Audio::CAudioDeviceInfoList &devices) override;
+            virtual void unRegisterDevices(const BlackMisc::Audio::CAudioDeviceInfoList &devices) override;
+            virtual BlackMisc::Audio::CAudioDeviceInfoList getRegisteredDevices() const override;
             //! @}
 
         protected:
@@ -54,6 +56,9 @@ namespace BlackCore
 
             //! Register myself in DBus
             CContextAudio *registerWithDBus(BlackMisc::CDBusServer *server);
+
+        private:
+            BlackMisc::Audio::CAudioDeviceInfoList m_registeredDevices;
         };
     } // namespace
 } // namespace
diff --git a/src/blackcore/context/contextaudioproxy.cpp b/src/blackcore/context/contextaudioproxy.cpp
index 078413799..7c980b31a 100644
--- a/src/blackcore/context/contextaudioproxy.cpp
+++ b/src/blackcore/context/contextaudioproxy.cpp
@@ -27,7 +27,7 @@ namespace BlackCore
     {
         CContextAudioProxy::CContextAudioProxy(const QString &serviceName, QDBusConnection &connection, CCoreFacadeConfig::ContextMode mode, CCoreFacade *runtime) : IContextAudio(mode, runtime), m_dBusInterface(nullptr)
         {
-            this->m_dBusInterface = new BlackMisc::CGenericDBusInterface(
+            this->m_dBusInterface = new CGenericDBusInterface(
                 serviceName, IContextAudio::ObjectPath(), IContextAudio::InterfaceName(), connection, this);
             this->relaySignals(serviceName, connection);
         }
@@ -40,6 +40,23 @@ namespace BlackCore
             Q_UNUSED(c)
         }
 
+        void CContextAudioProxy::registerDevices(const CAudioDeviceInfoList &devices)
+        {
+            if (devices.isEmpty()) { return; }
+            m_dBusInterface->callDBus(QLatin1String("registerDevices"));
+        }
+
+        void CContextAudioProxy::unRegisterDevices(const CAudioDeviceInfoList &devices)
+        {
+            if (devices.isEmpty()) { return; }
+            m_dBusInterface->callDBus(QLatin1String("unRegisterDevices"));
+        }
+
+        CAudioDeviceInfoList CContextAudioProxy::getRegisteredDevices() const
+        {
+            return m_dBusInterface->callDBusRet<BlackMisc::Audio::CAudioDeviceInfoList>(QLatin1String("getRegisteredDevices"));
+        }
+
         void CContextAudioProxy::relaySignals(const QString &serviceName, QDBusConnection &connection)
         {
             /**
@@ -51,14 +68,6 @@ namespace BlackCore
             Q_ASSERT(s);
             s = connection.connect(serviceName, IContextAudio::ObjectPath(), IContextAudio::InterfaceName(),
                                    "changedAudioDevices", this, SIGNAL(changedAudioDevices(BlackMisc::Audio::CAudioDeviceInfoList)));
-            Q_ASSERT(s);
-            s = connection.connect(serviceName, IContextAudio::ObjectPath(), IContextAudio::InterfaceName(),
-                                   "changedSelectedAudioDevices", this, SIGNAL(changedSelectedAudioDevices(BlackMisc::Audio::CAudioDeviceInfoList)));
-            Q_ASSERT(s);
-            s = connection.connect(serviceName, IContextAudio::ObjectPath(), IContextAudio::InterfaceName(),
-                                   "ptt", this, SIGNAL(ptt(bool, BlackMisc::Audio::PTTCOM, BlackMisc::CIdentifier)));
-            Q_ASSERT(s);
-            Q_UNUSED(s)
             **/
 
             this->relayBaseClassSignals(serviceName, connection, IContextAudio::ObjectPath(), IContextAudio::InterfaceName());
diff --git a/src/blackcore/context/contextaudioproxy.h b/src/blackcore/context/contextaudioproxy.h
index dce3cdc73..a5b66d1a5 100644
--- a/src/blackcore/context/contextaudioproxy.h
+++ b/src/blackcore/context/contextaudioproxy.h
@@ -58,10 +58,13 @@ namespace BlackCore
             static void unitTestRelaySignals();
 
         public slots:
-            // interface overrides
+            //! All Dbus xsinterface overrides
             //! \publicsection
             //! @{
-            //  ------ functions GO HERE -------
+            //! Register a device on a machine (for core/GUI it will return all known devices on all machines)
+            virtual void registerDevices(const BlackMisc::Audio::CAudioDeviceInfoList &devices) override;
+            virtual void unRegisterDevices(const BlackMisc::Audio::CAudioDeviceInfoList &devices) override;
+            virtual BlackMisc::Audio::CAudioDeviceInfoList getRegisteredDevices() const override;
             //! @}
 
         private: