diff --git a/api/current.txt b/api/current.txt
index 0b371e8743230..37bfd2e75aaf3 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -35611,6 +35611,7 @@ package android.telecom {
     method public void onCallAudioStateChanged(android.telecom.CallAudioState);
     method public void onCallRemoved(android.telecom.Call);
     method public void onCanAddCallChanged(boolean);
+    method public void onSilenceRinger();
     method public final void setAudioRoute(int);
     method public final void setMuted(boolean);
     field public static final java.lang.String SERVICE_INTERFACE = "android.telecom.InCallService";
@@ -35871,6 +35872,7 @@ package android.telecom {
     field public static final java.lang.String EXTRA_START_CALL_WITH_VIDEO_STATE = "android.telecom.extra.START_CALL_WITH_VIDEO_STATE";
     field public static final java.lang.String GATEWAY_ORIGINAL_ADDRESS = "android.telecom.extra.GATEWAY_ORIGINAL_ADDRESS";
     field public static final java.lang.String GATEWAY_PROVIDER_PACKAGE = "android.telecom.extra.GATEWAY_PROVIDER_PACKAGE";
+    field public static final java.lang.String METADATA_IN_CALL_SERVICE_RINGING = "android.telecom.IN_CALL_SERVICE_RINGING";
     field public static final java.lang.String METADATA_IN_CALL_SERVICE_UI = "android.telecom.IN_CALL_SERVICE_UI";
     field public static final int PRESENTATION_ALLOWED = 1; // 0x1
     field public static final int PRESENTATION_PAYPHONE = 4; // 0x4
diff --git a/api/system-current.txt b/api/system-current.txt
index 466806522af1c..188c919f216f7 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -37928,6 +37928,7 @@ package android.telecom {
     method public void onCanAddCallChanged(boolean);
     method public deprecated void onPhoneCreated(android.telecom.Phone);
     method public deprecated void onPhoneDestroyed(android.telecom.Phone);
+    method public void onSilenceRinger();
     method public final void setAudioRoute(int);
     method public final void setMuted(boolean);
     field public static final java.lang.String SERVICE_INTERFACE = "android.telecom.InCallService";
@@ -38009,6 +38010,7 @@ package android.telecom {
     method public void onCallAudioStateChanged(android.telecom.Phone, android.telecom.CallAudioState);
     method public void onCallRemoved(android.telecom.Phone, android.telecom.Call);
     method public void onCanAddCallChanged(android.telecom.Phone, boolean);
+    method public void onSilenceRinger(android.telecom.Phone);
   }
 
   public final class PhoneAccount implements android.os.Parcelable {
@@ -38268,6 +38270,7 @@ package android.telecom {
     field public static final java.lang.String EXTRA_START_CALL_WITH_VIDEO_STATE = "android.telecom.extra.START_CALL_WITH_VIDEO_STATE";
     field public static final java.lang.String GATEWAY_ORIGINAL_ADDRESS = "android.telecom.extra.GATEWAY_ORIGINAL_ADDRESS";
     field public static final java.lang.String GATEWAY_PROVIDER_PACKAGE = "android.telecom.extra.GATEWAY_PROVIDER_PACKAGE";
+    field public static final java.lang.String METADATA_IN_CALL_SERVICE_RINGING = "android.telecom.IN_CALL_SERVICE_RINGING";
     field public static final java.lang.String METADATA_IN_CALL_SERVICE_UI = "android.telecom.IN_CALL_SERVICE_UI";
     field public static final int PRESENTATION_ALLOWED = 1; // 0x1
     field public static final int PRESENTATION_PAYPHONE = 4; // 0x4
diff --git a/api/test-current.txt b/api/test-current.txt
index c87da044e83fa..d13ca99be4e88 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -35625,6 +35625,7 @@ package android.telecom {
     method public void onCallAudioStateChanged(android.telecom.CallAudioState);
     method public void onCallRemoved(android.telecom.Call);
     method public void onCanAddCallChanged(boolean);
+    method public void onSilenceRinger();
     method public final void setAudioRoute(int);
     method public final void setMuted(boolean);
     field public static final java.lang.String SERVICE_INTERFACE = "android.telecom.InCallService";
@@ -35885,6 +35886,7 @@ package android.telecom {
     field public static final java.lang.String EXTRA_START_CALL_WITH_VIDEO_STATE = "android.telecom.extra.START_CALL_WITH_VIDEO_STATE";
     field public static final java.lang.String GATEWAY_ORIGINAL_ADDRESS = "android.telecom.extra.GATEWAY_ORIGINAL_ADDRESS";
     field public static final java.lang.String GATEWAY_PROVIDER_PACKAGE = "android.telecom.extra.GATEWAY_PROVIDER_PACKAGE";
+    field public static final java.lang.String METADATA_IN_CALL_SERVICE_RINGING = "android.telecom.IN_CALL_SERVICE_RINGING";
     field public static final java.lang.String METADATA_IN_CALL_SERVICE_UI = "android.telecom.IN_CALL_SERVICE_UI";
     field public static final int PRESENTATION_ALLOWED = 1; // 0x1
     field public static final int PRESENTATION_PAYPHONE = 4; // 0x4
diff --git a/telecomm/java/android/telecom/InCallService.java b/telecomm/java/android/telecom/InCallService.java
index 426b240e9c781..671399b6f842c 100644
--- a/telecomm/java/android/telecom/InCallService.java
+++ b/telecomm/java/android/telecom/InCallService.java
@@ -73,6 +73,7 @@ public abstract class InCallService extends Service {
     private static final int MSG_ON_CALL_AUDIO_STATE_CHANGED = 5;
     private static final int MSG_BRING_TO_FOREGROUND = 6;
     private static final int MSG_ON_CAN_ADD_CALL_CHANGED = 7;
+    private static final int MSG_SILENCE_RINGER = 8;
 
     /** Default Handler used to consolidate binder method calls onto a single thread. */
     private final Handler mHandler = new Handler(Looper.getMainLooper()) {
@@ -114,6 +115,9 @@ public abstract class InCallService extends Service {
                 case MSG_ON_CAN_ADD_CALL_CHANGED:
                     mPhone.internalSetCanAddCall(msg.arg1 == 1);
                     break;
+                case MSG_SILENCE_RINGER:
+                    mPhone.internalSilenceRinger();
+                    break;
                 default:
                     break;
             }
@@ -165,6 +169,11 @@ public abstract class InCallService extends Service {
             mHandler.obtainMessage(MSG_ON_CAN_ADD_CALL_CHANGED, canAddCall ? 1 : 0, 0)
                     .sendToTarget();
         }
+
+        @Override
+        public void silenceRinger() {
+            mHandler.obtainMessage(MSG_SILENCE_RINGER).sendToTarget();
+        }
     }
 
     private Phone.Listener mPhoneListener = new Phone.Listener() {
@@ -202,6 +211,12 @@ public abstract class InCallService extends Service {
             InCallService.this.onCanAddCallChanged(canAddCall);
         }
 
+        /** ${inheritDoc} */
+        @Override
+        public void onSilenceRinger(Phone phone) {
+            InCallService.this.onSilenceRinger();
+        }
+
     };
 
     private Phone mPhone;
@@ -404,6 +419,12 @@ public abstract class InCallService extends Service {
     public void onCanAddCallChanged(boolean canAddCall) {
     }
 
+    /**
+     * Called to silence the ringer if a ringing call exists.
+     */
+    public void onSilenceRinger() {
+    }
+
     /**
      * Used to issue commands to the {@link Connection.VideoProvider} associated with a
      * {@link Call}.
diff --git a/telecomm/java/android/telecom/Phone.java b/telecomm/java/android/telecom/Phone.java
index 47154da242f49..56eb7ec5fb781 100644
--- a/telecomm/java/android/telecom/Phone.java
+++ b/telecomm/java/android/telecom/Phone.java
@@ -97,6 +97,13 @@ public final class Phone {
          * @param canAddCall Indicates whether an additional call can be added.
          */
         public void onCanAddCallChanged(Phone phone, boolean canAddCall) { }
+
+        /**
+         * Called to silence the ringer if a ringing call exists.
+         *
+         * @param phone The {@code Phone} calling this method.
+         */
+        public void onSilenceRinger(Phone phone) { }
     }
 
     // A Map allows us to track each Call by its Telecom-specified call ID
@@ -179,6 +186,10 @@ public final class Phone {
         }
     }
 
+    final void internalSilenceRinger() {
+        fireSilenceRinger();
+    }
+
     /**
      * Called to destroy the phone and cleanup any lingering calls.
      */
@@ -330,6 +341,12 @@ public final class Phone {
         }
     }
 
+    private void fireSilenceRinger() {
+        for (Listener listener : mListeners) {
+            listener.onSilenceRinger(this);
+        }
+    }
+
     private void checkCallTree(ParcelableCall parcelableCall) {
         if (parcelableCall.getParentCallId() != null &&
                 !mCallByTelecomCallId.containsKey(parcelableCall.getParentCallId())) {
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index 497864e875b83..72ff27227efb7 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -307,6 +307,15 @@ public class TelecomManager {
     public static final String METADATA_IN_CALL_SERVICE_CAR_MODE_UI =
             "android.telecom.IN_CALL_SERVICE_CAR_MODE_UI";
 
+    /**
+     * A boolean meta-data value indicating whether an {@link InCallService} implements ringing.
+     * Dialer implementations (see {@link #getDefaultDialerPackage()}) which would also like to
+     * override the system provided ringing should set this meta-data to {@code true} in the
+     * manifest registration of their {@link InCallService}.
+     */
+    public static final String METADATA_IN_CALL_SERVICE_RINGING =
+            "android.telecom.IN_CALL_SERVICE_RINGING";
+
     /**
      * The dual tone multi-frequency signaling character sent to indicate the dialing system should
      * pause for a predefined period.
diff --git a/telecomm/java/com/android/internal/telecom/IInCallService.aidl b/telecomm/java/com/android/internal/telecom/IInCallService.aidl
index ded47d5a0562d..0088e0cf6b64a 100644
--- a/telecomm/java/com/android/internal/telecom/IInCallService.aidl
+++ b/telecomm/java/com/android/internal/telecom/IInCallService.aidl
@@ -45,4 +45,6 @@ oneway interface IInCallService {
     void bringToForeground(boolean showDialpad);
 
     void onCanAddCallChanged(boolean canAddCall);
+
+    void silenceRinger();
 }