diff --git a/conf/sccpgeneral.xml.v431 b/conf/sccpgeneral.xml.v431
index 630da38..548808a 100644
--- a/conf/sccpgeneral.xml.v431
+++ b/conf/sccpgeneral.xml.v431
@@ -1098,13 +1098,13 @@ and open the template in the editor. Base Version before all crash :-)
             <help>You can specifying 'useRedialMenu = yes' in the sccp.conf device section and the redial softkey will cause the "placed calls" list instead of immediately calling the last dialed number.</help>
         </item>
 
-        <item type="IS-disabled" id="6" seq="99">
+        <item type="IS" id="6" seq="99">
             <name>force_dtmfmode</name> 
             <label>Dual-Tone Multi-Frequency (DTMF)</label>
             <default>auto</default>
             <button value="auto">AUTO</button>
-            <button value="RFC2833">RFC2833</button>
-            <button value="SKINNY">SKINNY</button>
+            <button value="rfc2833">RFC2833</button>
+            <button value="skinny">SKINNY</button>
             <help>Some phone models with bad firmware do send dtmf in a messed up order and need to be forced to skinny mode.</help>
         </item>
         <item type="IS" id="14">
diff --git a/install.php b/install.php
index 0bec247..3c6bbc1 100644
--- a/install.php
+++ b/install.php
@@ -89,7 +89,7 @@ function Get_DB_config($sccp_compatible) {
             'useRedialMenu' => array('create' => "VARCHAR(5) NULL DEFAULT 'no' AFTER `_hwlang`"),
             //'dtmfmode' => array('create' => "VARCHAR(10) default 'outofband'", 'modify' => "VARCHAR(10)", 'def_modify'=> 'outofband'),
             'dtmfmode' => array('drop' => "yes"),
-//            'force_dtmfmode' => array('create' => "VARCHAR(10) default 'auto'", 'modify' => "VARCHAR(10)", 'def_modify'=> 'auto'),
+//            'force_dtmfmode' => array('create' => "ENUM('auto','rfc2833','skinny') NOT NULL default 'auto'", 'modify' => "ENUM('auto','rfc2833','skinny')", 'def_modify'=> 'auto'),            
             'deny' => array('create' => 'VARCHAR(100) NULL DEFAULT NULL', 'modify' => "VARCHAR(100)"),
             'permit' => array('create' => 'VARCHAR(100) NULL DEFAULT NULL', 'modify' => "VARCHAR(100)"),
             'backgroundImage' => array('create' => 'VARCHAR(255) NULL DEFAULT NULL', 'modify' => "VARCHAR(255)"),
@@ -154,6 +154,7 @@ function Get_DB_config($sccp_compatible) {
             //'dtmfmode' => array('create' => "VARCHAR(10) default 'outofband'", 'modify' => "VARCHAR(10)", 'def_modify'=> 'outofband'),
             'dtmfmode' => array('drop' => "yes"),
 //            'force_dtmfmode' => array('create' => "VARCHAR(10) default 'auto'", 'modify' => "VARCHAR(10)", 'def_modify'=> 'auto'),
+            'force_dtmfmode' => array('create' => "ENUM('auto','rfc2833','skinny') NOT NULL default 'auto'", 'modify' => "ENUM('auto','rfc2833','skinny')", 'def_modify'=> 'auto'),
             'deny' => array('create' => 'VARCHAR(100) NULL DEFAULT NULL', 'modify' => "VARCHAR(100)"),
             'permit' => array('create' => 'VARCHAR(100) NULL DEFAULT NULL', 'modify' => "VARCHAR(100)"),
             'backgroundImage' => array('create' => 'VARCHAR(255) NULL DEFAULT NULL', 'modify' => "VARCHAR(255)"),