diff --git a/Essentials Core/PepperDashEssentialsBase/Devices/IHasDialer.cs b/Essentials Core/PepperDashEssentialsBase/Devices/CodecInterfaces.cs
similarity index 65%
rename from Essentials Core/PepperDashEssentialsBase/Devices/IHasDialer.cs
rename to Essentials Core/PepperDashEssentialsBase/Devices/CodecInterfaces.cs
index c4682abd..e3399d00 100644
--- a/Essentials Core/PepperDashEssentialsBase/Devices/IHasDialer.cs	
+++ b/Essentials Core/PepperDashEssentialsBase/Devices/CodecInterfaces.cs	
@@ -18,8 +18,28 @@ namespace PepperDash.Essentials.Core
         void AcceptCall();
         void RejectCall();
 
+        void SendDtmf();
+
         BoolFeedback InCallFeedback { get; }
         BoolFeedback IncomingCallFeedback { get; }
 
+
+        
+    }
+
+    public interface IHasCallHistory
+    {
+        // Add recent calls list
+    }
+
+    public interface IHasDirectory
+    {
+
+    }
+
+    public interface IHasObtp
+    {
+
+        // Upcoming Meeting warning event
     }
 }
\ No newline at end of file
diff --git a/Essentials Core/PepperDashEssentialsBase/Devices/IHasSharing.cs b/Essentials Core/PepperDashEssentialsBase/Devices/IHasSharing.cs
index 317a188a..675c11c3 100644
--- a/Essentials Core/PepperDashEssentialsBase/Devices/IHasSharing.cs	
+++ b/Essentials Core/PepperDashEssentialsBase/Devices/IHasSharing.cs	
@@ -11,7 +11,9 @@ namespace PepperDash.Essentials.Core
     /// </summary>
     public interface IHasSharing
     {
+        void StartSharing();
+        void StopSharing();
 
-        BoolFeedback SharingSourceFeedback { get; }
+        StringFeedback SharingSourceFeedback { get; }
     }
 }
\ No newline at end of file
diff --git a/Essentials Core/PepperDashEssentialsBase/PepperDash_Essentials_Core.csproj b/Essentials Core/PepperDashEssentialsBase/PepperDash_Essentials_Core.csproj
index e06834ec..94e66af1 100644
--- a/Essentials Core/PepperDashEssentialsBase/PepperDash_Essentials_Core.csproj	
+++ b/Essentials Core/PepperDashEssentialsBase/PepperDash_Essentials_Core.csproj	
@@ -103,7 +103,7 @@
     <Reference Include="System.Data" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="Devices\IHasDialer.cs" />
+    <Compile Include="Devices\CodecInterfaces.cs" />
     <Compile Include="Devices\IHasSharing.cs" />
     <Compile Include="Ramps and Increments\ActionIncrementer.cs" />
     <Compile Include="Comm and IR\CommFactory.cs" />
diff --git a/Essentials Devices Common/Essentials Devices Common/VC/VideoCodecBase.cs b/Essentials Devices Common/Essentials Devices Common/VC/VideoCodecBase.cs
index c0eddc21..75c0a67a 100644
--- a/Essentials Devices Common/Essentials Devices Common/VC/VideoCodecBase.cs	
+++ b/Essentials Devices Common/Essentials Devices Common/VC/VideoCodecBase.cs	
@@ -9,7 +9,7 @@ using PepperDash.Essentials.Core;
 
 namespace PepperDash.Essentials.Devices.VideoCodec
 {
-    public abstract class VideoCodecBase : Device, IRoutingSinkWithSwitching, IUsageTracking, IHasDialer //, ICodecAudio
+    public abstract class VideoCodecBase : Device, IRoutingSinkWithSwitching, IUsageTracking, IHasDialer, IHasSharing //, ICodecAudio
     {
         #region IUsageTracking Members
 
@@ -101,5 +101,11 @@ namespace PepperDash.Essentials.Devices.VideoCodec
         public BoolFeedback PrivacyModeIsOnFeedback { get; private set; }
 
         #endregion
+
+        #region IHasSharing Members
+
+        public BoolFeedback SharingSourceFeedback { get; private set; }
+
+        #endregion
     }
 }
\ No newline at end of file