diff --git a/dCArun/CArun.cpp b/dCArun/CArun.cpp
index 02b2558..d94460b 100644
--- a/dCArun/CArun.cpp
+++ b/dCArun/CArun.cpp
@@ -1,7 +1,7 @@
 #include "CArun.h"
 #include "datei.h"
 
-#include "CCWakelineAbstraction.h"
+#include "DigitalOutputAbstraction.h"
 
 
 CArun::CArun(QObject *parent)
@@ -20,7 +20,11 @@ CArun::CArun(QObject *parent)
 
     this->timerChainCtrl->start();
 
-    this->ccWakelineAbstraction = new CCWakelineAbstraction(this->HWaccess, this);
+
+    this->digitalOutputAbstraction = new DigitalOutputAbstraction(this->HWaccess, this);
+    this->digitalOutputAbstraction->addCCWake("/sys/class/leds/wakeupctrl_cc/brightness");
+    this->digitalOutputAbstraction->addCCPower("/run/powerctrl_cc");
+    this->digitalOutputAbstraction->addCCModem("/run/powerctrl_modem");
 }
 
 
diff --git a/dCArun/CArun.h b/dCArun/CArun.h
index 4be909e..402bcd8 100644
--- a/dCArun/CArun.h
+++ b/dCArun/CArun.h
@@ -22,7 +22,7 @@ enum class SETUP_STEP {
 };
 
 
-class CCWakelineAbstraction;
+class DigitalOutputAbstraction;
 
 class CArun : public QObject
 {
@@ -45,7 +45,7 @@ private:
 
     void openSerialPort();
 
-    CCWakelineAbstraction* ccWakelineAbstraction;
+    DigitalOutputAbstraction* digitalOutputAbstraction;
 
 signals:
 
diff --git a/dCArun/CCWakelineAbstraction.cpp b/dCArun/CCWakelineAbstraction.cpp
deleted file mode 100644
index d5513d6..0000000
--- a/dCArun/CCWakelineAbstraction.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-#include <QFileSystemWatcher>
-#include <QFile>
-
-#include <QDebug>
-
-#include "CCWakelineAbstraction.h"
-#include "plugin.h"
-
-/**
- * this is based on a solution from:
- * https://embeddeduse.com/2018/09/18/monitoring-sys-files-qfilesystemwatcher/
- *
- */
-
-CCWakelineAbstraction::CCWakelineAbstraction(hwinf *dc, QObject *parent)
-    : QObject(parent)
-    , dc(dc)
-{
-    auto ccWakeMonitor = new QFileSystemWatcher(this);
-
-    ccWakeMonitor->addPath("/sys/class/leds/wakeupctrl_cc/brightness");
-    connect(ccWakeMonitor, &QFileSystemWatcher::fileChanged,
-                this, &CCWakelineAbstraction::ccWakeChanged);
-
-    qCritical() << "... init CCWakelineAbstraction";
-}
-
-
-void CCWakelineAbstraction::ccWakeChanged(const QString &path)
-{
-    QFile ccWakeFile(path);
-     if (!ccWakeFile.open(QIODevice::ReadOnly)) {
-         qWarning() << "ERROR: Could not open ccWakeFile file.";
-         return;
-     }
-     auto ccWake = ccWakeFile.readAll();
-     if (!ccWake.isEmpty()) {
-         int state = ccWake.at(0);
-         //qCritical() << "INFO: ccWake = " << state;
-         switch (state) {
-         case 0x30:  // '1'
-             qCritical() << "INFO: ccWake -> sleep";
-             this->dc->credit_switchWake(true); // switch 'sleep'
-             break;
-         case 0x31:  // '0'
-             qCritical() << "INFO: ccWake -> wake";
-             this->dc->credit_switchWake(false); // switch 'wake'
-             break;
-         }
-     }
-}
diff --git a/dCArun/CCWakelineAbstraction.h b/dCArun/CCWakelineAbstraction.h
deleted file mode 100644
index 9d3cb06..0000000
--- a/dCArun/CCWakelineAbstraction.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#ifndef CCWAKELINEABSTRACTION_H
-#define CCWAKELINEABSTRACTION_H
-
-
-#include <QObject>
-
-class hwinf;
-class QFileSystemWatcher;
-
-
-class CCWakelineAbstraction : public QObject
-{
-    Q_OBJECT
-
-public:
-    CCWakelineAbstraction(hwinf *dc, QObject *parent = nullptr);
-
-private:
-    hwinf *dc;
-    QFileSystemWatcher *ccWakeMonitor;
-
-    void ccWakeChanged(const QString &path);
-};
-
-#endif // CCWAKELINEABSTRACTION_H
diff --git a/dCArun/DigitalOutputAbstraction.cpp b/dCArun/DigitalOutputAbstraction.cpp
new file mode 100644
index 0000000..9b0dd80
--- /dev/null
+++ b/dCArun/DigitalOutputAbstraction.cpp
@@ -0,0 +1,170 @@
+#include <QFileSystemWatcher>
+#include <QFile>
+#include <QFileInfo>
+#include <QTimer>
+
+#include <QDebug>
+
+#include "DigitalOutputAbstraction.h"
+#include "plugin.h"
+
+/**
+ * this is based on a solution from:
+ * https://embeddeduse.com/2018/09/18/monitoring-sys-files-qfilesystemwatcher/
+ *
+ */
+
+DigitalOutputAbstraction::DigitalOutputAbstraction(hwinf *dc, QObject *parent)
+    : QObject(parent)
+    , dc(dc)
+{
+    this->fileMonitor = new QFileSystemWatcher(this);
+
+    connect(this->fileMonitor, &QFileSystemWatcher::fileChanged,
+                this, &DigitalOutputAbstraction::fileChanged);
+
+    qCritical() << "... init DigitalOutputAbstraction";
+}
+
+
+
+
+bool DigitalOutputAbstraction::addCCWake(const QString file)
+{
+    // on PTU5: "/sys/class/leds/wakeupctrl_cc/brightness"
+    if (!QFileInfo::exists(file)) {
+        qCritical() << "   ... create file: " << file;
+        QFile(file).open(QIODevice::ReadWrite | QIODevice::Text);
+    }
+
+    qCritical() << "   ... add file: " << file;
+
+    this->ccWakePath = file;
+    return this->fileMonitor->addPath(file);
+}
+
+bool DigitalOutputAbstraction::addCCPower(const QString file)
+{
+    if (!QFileInfo::exists(file)) {
+        qCritical() << "   ... create file: " << file;
+        QFile(file).open(QIODevice::ReadWrite | QIODevice::Text);
+    }
+
+    qCritical() << "   ... add file: " << file;
+
+    this->ccPowerPath = file;
+    return this->fileMonitor->addPath(file);
+}
+
+bool DigitalOutputAbstraction::addCCModem(const QString file)
+{
+    if (!QFileInfo::exists(file)) {
+        qCritical() << "   ... create file: " << file;
+        QFile(file).open(QIODevice::ReadWrite | QIODevice::Text);
+    }
+
+    qCritical() << "   ... add file: " << file;
+
+    this->modemPowerPath = file;
+    return this->fileMonitor->addPath(file);
+}
+
+
+void DigitalOutputAbstraction::fileChanged(const QString &path)
+{
+    if (path == this->ccPowerPath)    this->private_ccPowerChanged();
+    if (path == this->ccWakePath)     this->private_ccWakeChanged();
+    if (path == this->modemPowerPath) this->private_modemPowerChanged();
+}
+
+void DigitalOutputAbstraction::private_modemPowerChanged()
+{
+    QFile modemPowerFile(this->modemPowerPath);
+    if (!modemPowerFile.open(QIODevice::ReadOnly)) {
+        qWarning() << "ERROR: Could not open modemPowerFile " << this->modemPowerPath;
+        return;
+    }
+    auto modemPower = modemPowerFile.readAll();
+    if (!modemPower.isEmpty()) {
+        int state = modemPower.at(0);
+        // qCritical() << "INFO: modemPower = " << state;
+        switch (state) {
+        case 0x30:  // '0'
+            qCritical() << "INFO: modemPower -> off";
+            this->dc->mod_switchWake(false);
+            this->dc->mod_switchPower(false);
+            break;
+        case 0x31:  // '1'
+            qCritical() << "INFO: modemPower -> on";
+            this->dc->mod_switchWake(true);
+            this->dc->mod_switchPower(true);
+            break;
+        }
+    }
+}
+
+void DigitalOutputAbstraction::private_ccPowerChanged()
+{
+    QFile ccPowerFile(this->ccPowerPath);
+    if (!ccPowerFile.open(QIODevice::ReadOnly)) {
+        qWarning() << "ERROR: Could not open ccPowerFile file.";
+        return;
+    }
+    auto ccPower = ccPowerFile.readAll();
+    if (!ccPower.isEmpty()) {
+        int state = ccPower.at(0);
+
+        auto lambdaOn = [this]() -> void
+        {
+            this->dc->credit_switchPower(true);
+            this->dc->credit_switchWake(true);
+        };
+        auto lambdaOff = [this]() -> void
+        {
+            this->dc->credit_switchPower(false);
+            this->dc->credit_switchWake(false);
+        };
+
+
+        //qCritical() << "INFO: ccPower = " << state;
+        switch (state) {
+        case 0x30:  // '0'
+            qCritical() << "INFO: ccPower -> off";
+            lambdaOff();
+            break;
+        case 0x31:  // '1'
+            qCritical() << "INFO: ccPower -> on";
+            lambdaOn();
+            break;
+        case 0x32:  // '2'
+            qCritical() << "INFO: ccPower -> on / off";
+            lambdaOff();
+            QTimer::singleShot(500, this, lambdaOn);
+            break;
+        }
+    }
+}
+
+void DigitalOutputAbstraction::private_ccWakeChanged()
+{
+    QFile ccWakeFile(this->ccWakePath);
+    if (!ccWakeFile.open(QIODevice::ReadOnly)) {
+        qWarning() << "ERROR: Could not open ccWakeFile " << this->ccWakePath;
+        return;
+    }
+    auto ccWake = ccWakeFile.readAll();
+    if (!ccWake.isEmpty()) {
+        int state = ccWake.at(0);
+        //qCritical() << "INFO: ccWake = " << state;
+        switch (state) {
+        case 0x30:  // '0'
+            qCritical() << "INFO: ccWake -> sleep";
+            this->dc->credit_switchWake(true); // switch 'sleep'
+            break;
+        case 0x31:  // '1'
+            qCritical() << "INFO: ccWake -> wake";
+            this->dc->credit_switchWake(false); // switch 'wake'
+            break;
+        }
+    }
+}
diff --git a/dCArun/DigitalOutputAbstraction.h b/dCArun/DigitalOutputAbstraction.h
new file mode 100644
index 0000000..f8f5910
--- /dev/null
+++ b/dCArun/DigitalOutputAbstraction.h
@@ -0,0 +1,37 @@
+#ifndef DIGITALOUTPUTABSTRACTION_H
+#define DIGITALOUTPUTABSTRACTION_H
+
+
+#include <QObject>
+
+class hwinf;
+class QFileSystemWatcher;
+
+
+class DigitalOutputAbstraction : public QObject
+{
+    Q_OBJECT
+
+public:
+    DigitalOutputAbstraction(hwinf *dc, QObject *parent = nullptr);
+    bool addCCWake(const QString file);
+    bool addCCPower(const QString file);
+    bool addCCModem(const QString file);
+
+
+private:
+    hwinf *dc;
+    QFileSystemWatcher *fileMonitor;
+
+    QString modemPowerPath;
+    QString ccPowerPath;
+    QString ccWakePath;
+
+    void fileChanged(const QString &path);
+
+    void private_modemPowerChanged();
+    void private_ccPowerChanged();
+    void private_ccWakeChanged();
+};
+
+#endif // DIGITALOUTPUTABSTRACTION_H
diff --git a/dCArun/dCArun.pro b/dCArun/dCArun.pro
index 676dd16..5ad0a58 100644
--- a/dCArun/dCArun.pro
+++ b/dCArun/dCArun.pro
@@ -40,14 +40,14 @@ DEFINES+=APP_EXTENDED_VERSION=\\\"$$EXTENDED_VERSION\\\"
 
 SOURCES += \
     CArun.cpp \
-    CCWakelineAbstraction.cpp \
+    DigitalOutputAbstraction.cpp \
     main.cpp \
     tslib.cpp \
     datei.cpp
 
 HEADERS += \
     CArun.h \
-    CCWakelineAbstraction.h \
+    DigitalOutputAbstraction.h \
     guidefs.h \
     tslib.h \
     versionHistory.txt \