diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 3be2bb0..b165ab1 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -440,6 +440,17 @@
             </intent-filter>
         </receiver>
 
+        <!-- "Accessibility" settings UI. Referenced by Dialer application. -->
+        <activity android:name="com.android.phone.settings.AccessibilitySettingsActivity"
+                android:label="@string/accessibility_settings_activity_title"
+                android:theme="@style/DialerSettingsLight">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <action android:name="android.telecom.action.SHOW_CALL_ACCESSIBILITY_SETTINGS" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
         <!-- CDMA Emergency Callback Mode -->
         <service android:name="EmergencyCallbackModeService">
         </service>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 3ae121c..2a3f3bd 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1261,6 +1261,11 @@
     <string name="sim_label_emergency_calls">Emergency calls</string>
     <string name="sim_description_emergency_calls">Emergency calling only</string>
     <string name="sim_description_default">SIM card, slot: <xliff:g id="slot_id">%s</xliff:g></string>
+
+    <!-- Title for activity to control accessibility settings such as TTY mode and hearing aid
+         compatability. [CHAR LIMIT=40] -->
+    <string name="accessibility_settings_activity_title">Accessibility</string>
+
     <!-- Configuration setting for world mode Format is <true;GID if any to be checked>-->
     <string translatable="false" name="config_world_mode"/>
 
diff --git a/res/xml/accessibility_settings.xml b/res/xml/accessibility_settings.xml
new file mode 100644
index 0000000..a67e2ad
--- /dev/null
+++ b/res/xml/accessibility_settings.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:phone="http://schemas.android.com/apk/res/com.android.phone"
+    android:title="@string/accessibility_settings_activity_title">
+
+    <com.android.phone.settings.TtyModeListPreference
+        android:key="@string/tty_mode_key"
+        android:title="@string/tty_mode_option_title"
+        android:summary="@string/tty_mode_option_summary"
+        android:persistent="false"
+        android:entries="@array/tty_mode_entries"
+        android:entryValues="@array/tty_mode_values"/>
+
+    <CheckBoxPreference
+        android:key="button_hac_key"
+        android:title="@string/hac_mode_title"
+        android:persistent="true"
+        android:summary="@string/hac_mode_summary"/>
+
+</PreferenceScreen>
diff --git a/res/xml/call_feature_setting.xml b/res/xml/call_feature_setting.xml
index 5c90bc8..65611e8 100644
--- a/res/xml/call_feature_setting.xml
+++ b/res/xml/call_feature_setting.xml
@@ -94,20 +94,6 @@
         android:persistent="false"
         android:summary="@string/auto_retry_mode_summary"/>
 
-    <com.android.phone.settings.TtyModeListPreference
-        android:key="@string/tty_mode_key"
-        android:title="@string/tty_mode_option_title"
-        android:summary="@string/tty_mode_option_summary"
-        android:persistent="false"
-        android:entries="@array/tty_mode_entries"
-        android:entryValues="@array/tty_mode_values"/>
-
-    <CheckBoxPreference
-        android:key="button_hac_key"
-        android:title="@string/hac_mode_title"
-        android:persistent="true"
-        android:summary="@string/hac_mode_summary"/>
-
     <PreferenceScreen
         android:key="button_gsm_more_expand_key"
         android:title="@string/labelGSMMore"
diff --git a/src/com/android/phone/CallFeaturesSetting.java b/src/com/android/phone/CallFeaturesSetting.java
index 95d7510..6d3b252 100644
--- a/src/com/android/phone/CallFeaturesSetting.java
+++ b/src/com/android/phone/CallFeaturesSetting.java
@@ -26,7 +26,6 @@
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.database.Cursor;
-import android.media.AudioManager;
 import android.os.AsyncResult;
 import android.os.Bundle;
 import android.os.Handler;
@@ -41,7 +40,6 @@
 import android.provider.Settings;
 import android.telecom.PhoneAccountHandle;
 import android.telecom.TelecomManager;
-import android.telephony.PhoneStateListener;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
@@ -56,7 +54,7 @@
 import com.android.phone.common.util.SettingsUtil;
 import com.android.phone.settings.AccountSelectionPreference;
 import com.android.phone.settings.CallForwardInfoUtil;
-import com.android.phone.settings.TtyModeListPreference;
+import com.android.phone.settings.SettingsConstants;
 import com.android.phone.settings.VoicemailDialogUtil;
 import com.android.phone.settings.VoicemailNotificationSettingsUtil;
 import com.android.phone.settings.VoicemailProviderListPreference;
@@ -155,8 +153,6 @@
     private static final String BUTTON_FDN_KEY   = "button_fdn_key";
 
     private static final String BUTTON_RETRY_KEY       = "button_auto_retry_key";
-    private static final String BUTTON_TTY_KEY         = "button_tty_mode_key";
-    private static final String BUTTON_HAC_KEY         = "button_hac_key";
 
     private static final String BUTTON_GSM_UMTS_OPTIONS = "button_gsm_more_expand_key";
     private static final String BUTTON_CDMA_OPTIONS = "button_cdma_more_expand_key";
@@ -173,24 +169,17 @@
     private static final int EVENT_FORWARDING_CHANGED       = 501;
     private static final int EVENT_FORWARDING_GET_COMPLETED = 502;
 
-    public static final String HAC_KEY = "HACSetting";
-    public static final String HAC_VAL_ON = "ON";
-    public static final String HAC_VAL_OFF = "OFF";
-
     /** Handle to voicemail pref */
     private static final int VOICEMAIL_PREF_ID = 1;
     private static final int VOICEMAIL_PROVIDER_CFG_ID = 2;
 
     private Phone mPhone;
-    private AudioManager mAudioManager;
 
     private SubscriptionInfoHelper mSubscriptionInfoHelper;
 
     private EditPhoneNumberPreference mSubMenuVoicemailSettings;
 
     private CheckBoxPreference mButtonAutoRetry;
-    private CheckBoxPreference mButtonHAC;
-    private TtyModeListPreference mButtonTTY;
     private VoicemailProviderListPreference mVoicemailProviders;
     private PreferenceScreen mVoicemailSettingsScreen;
     private PreferenceScreen mVoicemailSettings;
@@ -276,13 +265,6 @@
     public void onPause() {
         super.onPause();
         mForeground = false;
-
-        if (ImsManager.isVolteEnabledByPlatform(this) &&
-                !mPhone.getContext().getResources().getBoolean(
-                        com.android.internal.R.bool.config_carrier_volte_tty_supported)) {
-            TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
-            tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);
-        }
     }
 
     /**
@@ -303,23 +285,6 @@
      */
     private boolean mSetupVoicemail = false;
 
-    private final PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
-        /**
-         * Enable/disable the TTY setting when in/out of a call (and if carrier doesn't
-         * support VoLTE with TTY).
-         * @see android.telephony.PhoneStateListener#onCallStateChanged(int,
-         * java.lang.String)
-         */
-        @Override
-        public void onCallStateChanged(int state, String incomingNumber) {
-            if (DBG) log("PhoneStateListener.onCallStateChanged: state=" + state);
-            Preference pref = getPreferenceScreen().findPreference(BUTTON_TTY_KEY);
-            if (pref != null) {
-                pref.setEnabled(state == TelephonyManager.CALL_STATE_IDLE);
-            }
-        }
-    };
-
     /*
      * Click Listeners, handle click based on objects attached to UI.
      */
@@ -329,22 +294,11 @@
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
         if (preference == mSubMenuVoicemailSettings) {
             return true;
-        } else if (preference == mButtonTTY) {
-            return true;
         } else if (preference == mButtonAutoRetry) {
             android.provider.Settings.Global.putInt(mPhone.getContext().getContentResolver(),
                     android.provider.Settings.Global.CALL_AUTO_RETRY,
                     mButtonAutoRetry.isChecked() ? 1 : 0);
             return true;
-        } else if (preference == mButtonHAC) {
-            int hac = mButtonHAC.isChecked() ? 1 : 0;
-            // Update HAC value in Settings database
-            Settings.System.putInt(mPhone.getContext().getContentResolver(),
-                    Settings.System.HEARING_AID, hac);
-
-            // Update HAC Value in AudioManager
-            mAudioManager.setParameter(HAC_KEY, hac != 0 ? HAC_VAL_ON : HAC_VAL_OFF);
-            return true;
         } else if (preference.getKey().equals(mVoicemailSettings.getKey())) {
             // Check key instead of comparing reference because closing the voicemail notification
             // ringtone dialog invokes onResume(), but leaves the old preference screen up,
@@ -1134,8 +1088,6 @@
             return;
         }
 
-        mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
-
         // Show the voicemail preference in onResume if the calling intent specifies the
         // ACTION_ADD_VOICEMAIL action.
         mShowVoicemailPreference = (icicle == null) &&
@@ -1178,9 +1130,6 @@
         mSubMenuVoicemailSettings.setDialogTitle(R.string.voicemail_settings_number_label);
 
         mButtonAutoRetry = (CheckBoxPreference) findPreference(BUTTON_RETRY_KEY);
-        mButtonHAC = (CheckBoxPreference) findPreference(BUTTON_HAC_KEY);
-        mButtonTTY = (TtyModeListPreference) findPreference(
-                getResources().getString(R.string.tty_mode_key));
 
         mVoicemailProviders = (VoicemailProviderListPreference) findPreference(
                 BUTTON_VOICEMAIL_PROVIDER_KEY);
@@ -1214,22 +1163,6 @@
             mButtonAutoRetry = null;
         }
 
-        if (getResources().getBoolean(R.bool.hac_enabled)) {
-            mButtonHAC.setOnPreferenceChangeListener(this);
-            int hac = Settings.System.getInt(getContentResolver(), Settings.System.HEARING_AID, 0);
-            mButtonHAC.setChecked(hac != 0);
-        } else {
-            prefSet.removePreference(mButtonHAC);
-            mButtonHAC = null;
-        }
-
-        if (!telephonyManager.isMultiSimEnabled() && telecomManager.isTtySupported()) {
-            mButtonTTY.init();
-        } else {
-            prefSet.removePreference(mButtonTTY);
-            mButtonTTY = null;
-        }
-
         if (!getResources().getBoolean(R.bool.world_phone)) {
             Preference cdmaOptions = prefSet.findPreference(BUTTON_CDMA_OPTIONS);
             prefSet.removePreference(cdmaOptions);
@@ -1307,13 +1240,6 @@
         } else {
             prefSet.removePreference(mEnableVideoCalling);
         }
-
-        if (ImsManager.isVolteEnabledByPlatform(this) &&
-                !mPhone.getContext().getResources().getBoolean(
-                        com.android.internal.R.bool.config_carrier_volte_tty_supported)) {
-            TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
-            tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
-        }
     }
 
     @Override
diff --git a/src/com/android/phone/Constants.java b/src/com/android/phone/Constants.java
index 79a1e9a..64414e9 100644
--- a/src/com/android/phone/Constants.java
+++ b/src/com/android/phone/Constants.java
@@ -130,7 +130,4 @@
     // OutgoingCallBroadcaster, OtaUtils, etc.)
     //
 
-    // Dtmf tone type setting value for CDMA phone
-    public static final int DTMF_TONE_TYPE_NORMAL = 0;
-    public static final int DTMF_TONE_TYPE_LONG   = 1;
 }
diff --git a/src/com/android/phone/PhoneGlobals.java b/src/com/android/phone/PhoneGlobals.java
index d13ebfe..94a4661 100644
--- a/src/com/android/phone/PhoneGlobals.java
+++ b/src/com/android/phone/PhoneGlobals.java
@@ -64,6 +64,7 @@
 import com.android.internal.telephony.TelephonyCapabilities;
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.phone.common.CallLogAsync;
+import com.android.phone.settings.SettingsConstants;
 import com.android.server.sip.SipService;
 
 import java.util.ArrayList;
@@ -456,9 +457,9 @@
                     android.provider.Settings.System.HEARING_AID,
                     0);
             AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
-            audioManager.setParameter(CallFeaturesSetting.HAC_KEY, hac != 0 ?
-                                      CallFeaturesSetting.HAC_VAL_ON :
-                                      CallFeaturesSetting.HAC_VAL_OFF);
+            audioManager.setParameter(SettingsConstants.HAC_KEY,
+                    hac == SettingsConstants.HAC_ENABLED
+                            ? SettingsConstants.HAC_VAL_ON : SettingsConstants.HAC_VAL_OFF);
         }
     }
 
diff --git a/src/com/android/phone/settings/AccessibilitySettingsActivity.java b/src/com/android/phone/settings/AccessibilitySettingsActivity.java
new file mode 100644
index 0000000..769ef61
--- /dev/null
+++ b/src/com/android/phone/settings/AccessibilitySettingsActivity.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.phone.settings;
+
+import android.os.Bundle;
+import android.preference.PreferenceActivity;
+import android.view.MenuItem;
+
+import com.android.phone.R;
+
+public class AccessibilitySettingsActivity extends PreferenceActivity {
+
+   @Override
+    protected void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        getActionBar().setTitle(R.string.accessibility_settings_activity_title);
+        getFragmentManager().beginTransaction().replace(
+                android.R.id.content, new AccessibilitySettingsFragment()).commit();
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            onBackPressed();
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+}
diff --git a/src/com/android/phone/settings/AccessibilitySettingsFragment.java b/src/com/android/phone/settings/AccessibilitySettingsFragment.java
new file mode 100644
index 0000000..4d78026
--- /dev/null
+++ b/src/com/android/phone/settings/AccessibilitySettingsFragment.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.phone.settings;
+
+import android.content.Context;
+import android.media.AudioManager;
+import android.os.Bundle;
+import android.preference.CheckBoxPreference;
+import android.preference.Preference;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceScreen;
+import android.provider.Settings;
+import android.telecom.TelecomManager;
+import android.telephony.PhoneStateListener;
+import android.telephony.TelephonyManager;
+import android.util.Log;
+
+import com.android.ims.ImsManager;
+import com.android.phone.PhoneGlobals;
+import com.android.phone.R;
+import com.android.phone.settings.TtyModeListPreference;
+
+public class AccessibilitySettingsFragment extends PreferenceFragment {
+    private static final String LOG_TAG = AccessibilitySettingsFragment.class.getSimpleName();
+    private static final boolean DBG = (PhoneGlobals.DBG_LEVEL >= 2);
+
+    private static final String BUTTON_TTY_KEY = "button_tty_mode_key";
+    private static final String BUTTON_HAC_KEY = "button_hac_key";
+
+    private final PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
+        /**
+         * Enable/disable the TTY setting when in/out of a call (and if carrier doesn't
+         * support VoLTE with TTY).
+         * @see android.telephony.PhoneStateListener#onCallStateChanged(int,
+         * java.lang.String)
+         */
+        @Override
+        public void onCallStateChanged(int state, String incomingNumber) {
+            if (DBG) Log.d(LOG_TAG, "PhoneStateListener.onCallStateChanged: state=" + state);
+            Preference pref = getPreferenceScreen().findPreference(BUTTON_TTY_KEY);
+            if (pref != null) {
+                pref.setEnabled(state == TelephonyManager.CALL_STATE_IDLE);
+            }
+        }
+    };
+
+    private Context mContext;
+    private AudioManager mAudioManager;
+
+    private TtyModeListPreference mButtonTTY;
+    private CheckBoxPreference mButtonHAC;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        mContext = getActivity().getApplicationContext();
+        mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
+
+        addPreferencesFromResource(R.xml.accessibility_settings);
+
+        mButtonTTY = (TtyModeListPreference) findPreference(
+                getResources().getString(R.string.tty_mode_key));
+        mButtonHAC = (CheckBoxPreference) findPreference(BUTTON_HAC_KEY);
+
+        TelecomManager telecomManager = TelecomManager.from(mContext);
+        TelephonyManager telephonyManager =
+                (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
+
+        if (!telephonyManager.isMultiSimEnabled() && telecomManager.isTtySupported()) {
+            mButtonTTY.init();
+        } else {
+            getPreferenceScreen().removePreference(mButtonTTY);
+            mButtonTTY = null;
+        }
+
+        if (getResources().getBoolean(R.bool.hac_enabled)) {
+            int hac = Settings.System.getInt(mContext.getContentResolver(),
+                    Settings.System.HEARING_AID, SettingsConstants.HAC_DISABLED);
+            mButtonHAC.setChecked(hac == SettingsConstants.HAC_ENABLED);
+        } else {
+            getPreferenceScreen().removePreference(mButtonHAC);
+            mButtonHAC = null;
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (ImsManager.isVolteEnabledByPlatform(mContext) &&
+                mContext.getResources().getBoolean(
+                        com.android.internal.R.bool.config_carrier_volte_tty_supported)) {
+            TelephonyManager tm =
+                    (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
+            tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
+        }
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+
+        if (ImsManager.isVolteEnabledByPlatform(mContext) &&
+                !mContext.getResources().getBoolean(
+                        com.android.internal.R.bool.config_carrier_volte_tty_supported)) {
+            TelephonyManager tm =
+                    (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
+            tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);
+        }
+    }
+
+    @Override
+    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
+        if (preference == mButtonTTY) {
+            return true;
+        } else if (preference == mButtonHAC) {
+            int hac = mButtonHAC.isChecked()
+                    ? SettingsConstants.HAC_ENABLED : SettingsConstants.HAC_DISABLED;
+            // Update HAC value in Settings database.
+            Settings.System.putInt(mContext.getContentResolver(), Settings.System.HEARING_AID, hac);
+
+            // Update HAC Value in AudioManager.
+            mAudioManager.setParameter(SettingsConstants.HAC_KEY,
+                    hac == SettingsConstants.HAC_ENABLED
+                            ? SettingsConstants.HAC_VAL_ON : SettingsConstants.HAC_VAL_OFF);
+            return true;
+        }
+        return false;
+    }
+}
diff --git a/src/com/android/phone/settings/SettingsConstants.java b/src/com/android/phone/settings/SettingsConstants.java
new file mode 100644
index 0000000..c17e6df
--- /dev/null
+++ b/src/com/android/phone/settings/SettingsConstants.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.phone.settings;
+
+/**
+ * Constants related to settings which are shared by two or more classes.
+ */
+public class SettingsConstants {
+    // Dtmf tone type setting value for CDMA phone
+    public static final int DTMF_TONE_TYPE_NORMAL = 0;
+    public static final int DTMF_TONE_TYPE_LONG   = 1;
+
+    // Hearing Aid Compatability settings values.
+    public static final String HAC_KEY = "HACSetting";
+    public static final int HAC_DISABLED = 0;
+    public static final int HAC_ENABLED = 1;
+    public static final String HAC_VAL_ON = "ON";
+    public static final String HAC_VAL_OFF = "OFF";
+}
diff --git a/src/com/android/services/telephony/CdmaConnection.java b/src/com/android/services/telephony/CdmaConnection.java
index 0baa3cc..74e0673 100644
--- a/src/com/android/services/telephony/CdmaConnection.java
+++ b/src/com/android/services/telephony/CdmaConnection.java
@@ -27,7 +27,7 @@
 import com.android.internal.telephony.CallStateException;
 import com.android.internal.telephony.Connection;
 import com.android.internal.telephony.Phone;
-import com.android.phone.Constants;
+import com.android.phone.settings.SettingsConstants;
 
 import java.util.LinkedList;
 import java.util.Queue;
@@ -234,8 +234,8 @@
         int dtmfTypeSetting = Settings.System.getInt(
                 getPhone().getContext().getContentResolver(),
                 Settings.System.DTMF_TONE_TYPE_WHEN_DIALING,
-                Constants.DTMF_TONE_TYPE_NORMAL);
-        return dtmfTypeSetting == Constants.DTMF_TONE_TYPE_NORMAL;
+                SettingsConstants.DTMF_TONE_TYPE_NORMAL);
+        return dtmfTypeSetting == SettingsConstants.DTMF_TONE_TYPE_NORMAL;
     }
 
     private void sendShortDtmfToNetwork(char digit) {