diff --git a/src/blackcore/afv/clients/afvclient.cpp b/src/blackcore/afv/clients/afvclient.cpp
index 3f4d67ad2..f05cc660e 100644
--- a/src/blackcore/afv/clients/afvclient.cpp
+++ b/src/blackcore/afv/clients/afvclient.cpp
@@ -16,6 +16,7 @@ using namespace BlackCore::Context;
 using namespace BlackCore::Afv::Audio;
 using namespace BlackCore::Afv::Connection;
 using namespace BlackMisc;
+using namespace BlackMisc::Audio;
 using namespace BlackMisc::PhysicalQuantities;
 using namespace BlackMisc::Simulation;
 using namespace BlackSound::SampleProvider;
@@ -302,9 +303,14 @@ namespace BlackCore
                 qDebug() << "PTT:" << active;
             }
 
+            void CAfvClient::setPttForCom(bool active, PTTCOM com)
+            {
+                this->setPtt(active);
+            }
+
             void CAfvClient::setInputVolumeDb(double value)
             {
-                if (value > 18) { value = 18; }
+                if (value > 18)  { value = 18; }
                 if (value < -18) { value = -18; }
                 m_inputVolumeDb = value;
                 m_input->setVolume(qPow(10, value / 20));
diff --git a/src/blackcore/afv/clients/afvclient.h b/src/blackcore/afv/clients/afvclient.h
index 6b9ffa8b8..269783dd5 100644
--- a/src/blackcore/afv/clients/afvclient.h
+++ b/src/blackcore/afv/clients/afvclient.h
@@ -16,9 +16,11 @@
 #include "blackcore/afv/audio/output.h"
 #include "blackcore/afv/audio/soundcardsampleprovider.h"
 #include "blackcore/afv/dto.h"
-#include "blackcore/blackcoreexport.h"
 
 #include "blackcore/context/contextownaircraft.h"
+#include "blackcore/blackcoreexport.h"
+
+#include "blackmisc/audio/ptt.h"
 #include "blacksound/sampleprovider/volumesampleprovider.h"
 
 #include <QAudioDeviceInfo>
@@ -87,7 +89,12 @@ namespace BlackCore
                 void setTransmittingTransceivers(quint16 transceiverID);
                 void setTransmittingTransceivers(const QVector<TxTransceiverDto> &transceivers);
 
+                //! Push to talk @{
                 Q_INVOKABLE void setPtt(bool active);
+                void setPttForCom(bool active, BlackMisc::Audio::PTTCOM com);
+                //! @}
+
+
                 Q_INVOKABLE void setLoopBack(bool on) { m_loopbackOn = on; }
 
                 //! Input volume in DB, +-18DB @{
diff --git a/src/blackcore/context/contextaudioimpl.cpp b/src/blackcore/context/contextaudioimpl.cpp
index 55c2c9602..5a2d8af3d 100644
--- a/src/blackcore/context/contextaudioimpl.cpp
+++ b/src/blackcore/context/contextaudioimpl.cpp
@@ -456,7 +456,7 @@ namespace BlackCore
 
             // changed not yet used, but I keep it for debugging
             // changedVoiceRooms called by connectionStatusChanged;
-            Q_UNUSED(changed);
+            Q_UNUSED(changed)
         }
 
         CCallsignSet CContextAudio::getRoomCallsigns(CComSystem::ComUnit comUnitValue) const
@@ -556,7 +556,7 @@ namespace BlackCore
 
         bool CContextAudio::parseCommandLine(const QString &commandLine, const BlackMisc::CIdentifier &originator)
         {
-            Q_UNUSED(originator);
+            Q_UNUSED(originator)
             if (commandLine.isEmpty()) { return false; }
             CSimpleCommandParser parser(
             {
@@ -585,8 +585,12 @@ namespace BlackCore
             return false;
         }
 
-        void CContextAudio::setVoiceTransmission(bool enable, COM com)
+        void CContextAudio::setVoiceTransmission(bool enable, PTTCOM com)
         {
+            m_voiceClient.setPttForCom(enable, com);
+
+            /**
+
             // first apporach of T609 multiple COM
             QSharedPointer<IVoiceChannel> voiceChannelCom = nullptr;
             CComSystem::ComUnit usedUnit = CComSystem::Com1;
@@ -614,6 +618,8 @@ namespace BlackCore
                 m_audioMixer->removeMixerConnection(IAudioMixer::InputMicrophone, mixerOutputPort);
             }
 
+            **/
+
             /** fixme KB 201908 to be removed if the above works
             if (!m_voiceChannelMapping.contains(CComSystem::Com1)) { return; }
             QSharedPointer<IVoiceChannel> voiceChannelCom1 = m_voiceChannelMapping.value(CComSystem::Com1);
@@ -650,7 +656,7 @@ namespace BlackCore
             IVoiceChannel::ConnectionStatus oldStatus,
             IVoiceChannel::ConnectionStatus newStatus)
         {
-            Q_UNUSED(oldStatus);
+            Q_UNUSED(oldStatus)
 
             switch (newStatus)
             {
diff --git a/src/blackcore/context/contextaudioimpl.h b/src/blackcore/context/contextaudioimpl.h
index 60198d040..e4a8468ab 100644
--- a/src/blackcore/context/contextaudioimpl.h
+++ b/src/blackcore/context/contextaudioimpl.h
@@ -23,6 +23,7 @@
 #include "blackmisc/audio/audiodeviceinfolist.h"
 #include "blackmisc/audio/notificationsounds.h"
 #include "blackmisc/audio/voiceroomlist.h"
+#include "blackmisc/audio/ptt.h"
 #include "blackmisc/input/actionhotkeydefs.h"
 #include "blackmisc/aviation/callsignset.h"
 #include "blackmisc/aviation/comsystem.h"
@@ -121,15 +122,6 @@ namespace BlackCore
             CContextAudio *registerWithDBus(BlackMisc::CDBusServer *server);
 
         private:
-            //! Voice COM channel
-            enum COM
-            {
-                COM1,
-                COM2,
-                COMActive,
-                COMUnspecified
-            };
-
             BlackMisc::Audio::CVoiceRoomList getComVoiceRooms() const;
             BlackMisc::Audio::CVoiceRoomList getComVoiceRoomsWithAudioStatus() const;
             bool canTalk() const;
@@ -146,7 +138,7 @@ namespace BlackCore
             void onConnectionStatusChanged(IVoiceChannel::ConnectionStatus oldStatus, IVoiceChannel::ConnectionStatus newStatus);
 
             //! Enable/disable voice transmission, nornally used with hotkey @{
-            void setVoiceTransmission(bool enable, COM com);
+            void setVoiceTransmission(bool enable, BlackMisc::Audio::PTTCOM com);
             void setVoiceTransmissionCom1(bool enabled);
             void setVoiceTransmissionCom2(bool enabled);
             void setVoiceTransmissionComActive(bool enabled);
diff --git a/src/blackmisc/audio/ptt.h b/src/blackmisc/audio/ptt.h
new file mode 100644
index 000000000..a38244170
--- /dev/null
+++ b/src/blackmisc/audio/ptt.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2019
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution. No part of swift project, including this file, may be copied, modified, propagated,
+ * or distributed except according to the terms contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKMISC_AUDIO_PTT_H
+#define BLACKMISC_AUDIO_PTT_H
+
+#include <QObject>
+
+namespace BlackMisc
+{
+    namespace Audio
+    {
+        //! Voice COM channel
+        enum PTTCOM
+        {
+            COM1,
+            COM2,
+            COMActive,
+            COMUnspecified
+        };
+    }
+}
+
+Q_DECLARE_METATYPE(BlackMisc::Audio::PTTCOM)
+
+#endif // guard
+
+
diff --git a/src/blackmisc/audio/registermetadataaudio.cpp b/src/blackmisc/audio/registermetadataaudio.cpp
index ac34ce265..67822bf7f 100644
--- a/src/blackmisc/audio/registermetadataaudio.cpp
+++ b/src/blackmisc/audio/registermetadataaudio.cpp
@@ -8,6 +8,7 @@
 
 #include "registermetadataaudio.h"
 #include "audio.h"
+#include "ptt.h"
 #include <QDBusMetaType>
 
 namespace BlackMisc
@@ -25,6 +26,7 @@ namespace BlackMisc
             CVoiceSetup::registerMetadata();
 
             // ENUMs
+            qDBusRegisterMetaType<PTTCOM>();
             qDBusRegisterMetaType<CNotificationSounds::PlayMode>();
             qDBusRegisterMetaType<CNotificationSounds::NotificationFlag>();
             qRegisterMetaTypeStreamOperators<CNotificationSounds::PlayMode>();