diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index aeb564b49ea8b..8b9b0e2134fa3 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -2876,4 +2876,7 @@
     <!-- Handle volume keys directly in Window Manager without passing them to the foreground app -->
     <bool name="config_handleVolumeKeysInWindowManager">false</bool>
 
+    <!-- Volume level of in-call notification tone playback,
+         relative to the overall voice call stream volume [0..100] -->
+    <integer name="config_inCallNotificationVolumeRelative">67</integer>
 </resources>
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index cff6eb198473e..658ba57613208 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -3011,4 +3011,6 @@
   <java-symbol type="array" name="config_allowedSecureInstantAppSettings" />
 
   <java-symbol type="bool" name="config_handleVolumeKeysInWindowManager" />
+
+  <java-symbol type="integer" name="config_inCallNotificationVolumeRelative" />
 </resources>
diff --git a/services/core/java/com/android/server/notification/NotificationManagerService.java b/services/core/java/com/android/server/notification/NotificationManagerService.java
index 70766f907df5f..23a1a78855d56 100644
--- a/services/core/java/com/android/server/notification/NotificationManagerService.java
+++ b/services/core/java/com/android/server/notification/NotificationManagerService.java
@@ -96,6 +96,7 @@ import android.database.ContentObserver;
 import android.media.AudioManager;
 import android.media.AudioManagerInternal;
 import android.media.IRingtonePlayer;
+import android.media.ToneGenerator;
 import android.net.Uri;
 import android.os.Binder;
 import android.os.Build;
@@ -301,6 +302,10 @@ public class NotificationManagerService extends SystemService {
     private boolean mInCall = false;
     private boolean mNotificationPulseEnabled;
 
+    // for generating notification tones in-call
+    private ToneGenerator mInCallToneGenerator;
+    private final Object mInCallToneGeneratorLock = new Object();
+
     // used as a mutex for access to all active notifications & listeners
     final Object mNotificationLock = new Object();
     final ArrayList<NotificationRecord> mNotificationList =
@@ -854,6 +859,30 @@ public class NotificationManagerService extends SystemService {
                 mInCall = TelephonyManager.EXTRA_STATE_OFFHOOK
                         .equals(intent.getStringExtra(TelephonyManager.EXTRA_STATE));
                 updateNotificationPulse();
+                synchronized (mInCallToneGeneratorLock) {
+                    if (mInCall) {
+                        if (mInCallToneGenerator == null) {
+                            int relativeToneVolume = getContext().getResources().getInteger(
+                                    R.integer.config_inCallNotificationVolumeRelative);
+                            if (relativeToneVolume < ToneGenerator.MIN_VOLUME
+                                    || relativeToneVolume > ToneGenerator.MAX_VOLUME) {
+                                relativeToneVolume = ToneGenerator.MAX_VOLUME;
+                            }
+                            try {
+                                mInCallToneGenerator = new ToneGenerator(
+                                        AudioManager.STREAM_VOICE_CALL, relativeToneVolume);
+                            } catch (RuntimeException e) {
+                                Log.e(TAG, "Error creating local tone generator: " + e);
+                                mInCallToneGenerator = null;
+                            }
+                        }
+                    } else {
+                        if (mInCallToneGenerator != null) {
+                            mInCallToneGenerator.release();
+                            mInCallToneGenerator = null;
+                        }
+                     }
+                }
             } else if (action.equals(Intent.ACTION_USER_STOPPED)) {
                 int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, -1);
                 if (userHandle >= 0) {
@@ -3723,14 +3752,21 @@ public class NotificationManagerService extends SystemService {
             hasValidVibrate = vibration != null;
 
             if (!shouldMuteNotificationLocked(record)) {
-
                 sendAccessibilityEvent(notification, record.sbn.getPackageName());
+
                 if (hasValidSound) {
                     mSoundNotificationKey = key;
-                    beep = playSound(record, soundUri);
+                    if (mInCall) {
+                        playInCallNotification();
+                        beep = true;
+                    } else {
+                        beep = playSound(record, soundUri);
+                    }
                 }
-                if (hasValidVibrate && !(mAudioManager.getRingerModeInternal()
-                        == AudioManager.RINGER_MODE_SILENT)) {
+
+                final boolean ringerModeSilent =
+                        mAudioManager.getRingerModeInternal() == AudioManager.RINGER_MODE_SILENT;
+                if (!mInCall && hasValidVibrate && !ringerModeSilent) {
                     mVibrateNotificationKey = key;
 
                     buzz = playVibration(record, vibration);
@@ -3839,6 +3875,26 @@ public class NotificationManagerService extends SystemService {
         }
     }
 
+    private void playInCallNotification() {
+        new Thread() {
+            @Override
+            public void run() {
+                // If toneGenerator creation fails, just continue the call
+                // without playing the notification sound.
+                try {
+                    synchronized (mInCallToneGeneratorLock) {
+                        if (mInCallToneGenerator != null) {
+                            // limit this tone to 1 second; BEEP2 should in fact be much shorter
+                            mInCallToneGenerator.startTone(ToneGenerator.TONE_PROP_BEEP2, 1000);
+                        }
+                    }
+                } catch (RuntimeException e) {
+                    Log.w(TAG, "Exception from ToneGenerator: " + e);
+                }
+            }
+        }.start();
+    }
+
     void showNextToastLocked() {
         ToastRecord record = mToastQueue.get(0);
         while (record != null) {