Defined VcCodecBase, new Vc interfaces and started CiscoCodec class

Essentials Core/PepperDashEssentialsBase/Devices/IHasDialer.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+namespace PepperDash.Essentials.Core
+{
+    /// <summary>
+    /// Requirements for a device that has dialing capabilities
+    /// </summary>
+    public interface IHasDialer
+    {
+        // Add requirements for Dialer functionality
+
+        void Dial();
+        void EndCall();
+
+        BoolFeedback InCallFeedback { get; }
+
+    }
+}

Essentials Core/PepperDashEssentialsBase/Devices/IVolumeAndAudioInterfaces.cs

@@ -66,7 +66,32 @@ namespace PepperDash.Essentials.Core
 		IntFeedback TrebleFeedback { get; }
 		IntFeedback MaxVolumeFeedback { get; }
 		IntFeedback DefaultVolumeFeedback { get; }
-	}
+	}
+
+    /// <summary>
+    /// Defines minimum volume controls for a codec device with dialing capabilities
+    /// </summary>
+    public interface ICodecAudio
+    {
+        void SetReceiveVolume(ushort level);
+        void ReceiveMuteOn();
+        void ReceiveMuteOff();
+        void ReceiveMuteToggle();
+        IntFeedback ReceiveLevelFeedback { get; }
+        BoolFeedback ReceiveMuteIsOnFeedback { get; }
+
+        void SetTransmitVolume(ushort level);
+        void TransmitMuteOn();
+        void TransmitMuteOff();
+        void TransmitMuteToggle();
+        IntFeedback TransmitLevelFeedback { get; }
+        BoolFeedback TransmitMuteIsOnFeedback { get; }
+
+        void PrivacyModeOn();
+        void PrivacyModeOff();
+        void PrivacyModeToggle();
+        BoolFeedback PrivacyModeIsOnFeedback { get; }
+    }