diff --git a/src/com/android/server/telecom/Call.java b/src/com/android/server/telecom/Call.java
index 8fae923..0218124 100644
--- a/src/com/android/server/telecom/Call.java
+++ b/src/com/android/server/telecom/Call.java
@@ -85,6 +85,7 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 
 /**
  *  Encapsulates all aspects of a given phone call throughout its lifecycle, starting
@@ -3160,6 +3161,13 @@
     void setConferenceableCalls(List<Call> conferenceableCalls) {
         mConferenceableCalls.clear();
         mConferenceableCalls.addAll(conferenceableCalls);
+        String confCallIds = "";
+        if (!conferenceableCalls.isEmpty()) {
+            confCallIds = conferenceableCalls.stream()
+                    .map(c -> c.getId())
+                    .collect(Collectors.joining(","));
+        }
+        Log.addEvent(this, LogUtils.Events.CONF_CALLS_CHANGED, confCallIds);
 
         for (Listener l : mListeners) {
             l.onConferenceableCallsChanged(this);
diff --git a/src/com/android/server/telecom/ConnectionServiceWrapper.java b/src/com/android/server/telecom/ConnectionServiceWrapper.java
index 21c6844..da2669c 100755
--- a/src/com/android/server/telecom/ConnectionServiceWrapper.java
+++ b/src/com/android/server/telecom/ConnectionServiceWrapper.java
@@ -920,6 +920,45 @@
                         } else {
                             connectIdToCheck = callId;
                         }
+
+                        // Handle the case where an existing connection was added by Telephony via
+                        // a connection manager.  The remote connection service API does not include
+                        // the ability to specify a parent connection when adding an existing
+                        // connection, so we stash the desired parent in the connection extras.
+                        if (connectionExtras != null
+                                && connectionExtras.containsKey(
+                                        Connection.EXTRA_ADD_TO_CONFERENCE_ID)
+                                && connection.getParentCallId() == null) {
+                            String parentId = connectionExtras.getString(
+                                    Connection.EXTRA_ADD_TO_CONFERENCE_ID);
+                            Log.i(ConnectionServiceWrapper.this, "addExistingConnection: remote "
+                                    + "connection will auto-add to parent %s", parentId);
+                            // Replace parcelable connection instance, swapping the new desired
+                            // parent in.
+                            connection = new ParcelableConnection(
+                                    connection.getPhoneAccount(),
+                                    connection.getState(),
+                                    connection.getConnectionCapabilities(),
+                                    connection.getConnectionProperties(),
+                                    connection.getSupportedAudioRoutes(),
+                                    connection.getHandle(),
+                                    connection.getHandlePresentation(),
+                                    connection.getCallerDisplayName(),
+                                    connection.getCallerDisplayNamePresentation(),
+                                    connection.getVideoProvider(),
+                                    connection.getVideoState(),
+                                    connection.isRingbackRequested(),
+                                    connection.getIsVoipAudioMode(),
+                                    connection.getConnectTimeMillis(),
+                                    connection.getConnectElapsedTimeMillis(),
+                                    connection.getStatusHints(),
+                                    connection.getDisconnectCause(),
+                                    connection.getConferenceableConnectionIds(),
+                                    connection.getExtras(),
+                                    parentId,
+                                    connection.getCallDirection(),
+                                    connection.getCallerNumberVerificationStatus());
+                        }
                         // Check to see if this Connection has already been added.
                         Call alreadyAddedConnection = mCallsManager
                                 .getAlreadyAddedConnection(connectIdToCheck);
diff --git a/src/com/android/server/telecom/LogUtils.java b/src/com/android/server/telecom/LogUtils.java
index 138e441..f53f239 100644
--- a/src/com/android/server/telecom/LogUtils.java
+++ b/src/com/android/server/telecom/LogUtils.java
@@ -138,6 +138,7 @@
         public static final String REMOVE_CHILD = "REMOVE_CHILD";
         public static final String SET_PARENT = "SET_PARENT";
         public static final String CONF_STATE_CHANGED = "CONF_STATE_CHANGED";
+        public static final String CONF_CALLS_CHANGED = "CONF_CALLS_CHANGED";
         public static final String CALL_DIRECTION_CHANGED = "CALL_DIRECTION_CHANGED";
         public static final String MUTE = "MUTE";
         public static final String UNMUTE = "UNMUTE";