diff --git a/src/PepperDash.Essentials.Devices.Common/AudioCodec/Interfaces/IDtmfDecode.cs b/src/PepperDash.Essentials.Devices.Common/AudioCodec/Interfaces/IDtmfDecode.cs
new file mode 100644
index 00000000..68c06bfd
--- /dev/null
+++ b/src/PepperDash.Essentials.Devices.Common/AudioCodec/Interfaces/IDtmfDecode.cs
@@ -0,0 +1,19 @@
+namespace PepperDash.Essentials.Devices.Common.AudioCodec;
+
+public interface IDtmfDecode
+{
+    /// <summary>
+    /// Event fired when a DTMF digit is received
+    /// </summary>
+    event EventHandler<DtmfReceivedEventArgs> DtmfReceived;
+}
+
+public class DtmfReceivedEventArgs : EventArgs
+{
+    public string Digit { get; private set; }
+
+    public DtmfReceivedEventArgs(string digit)
+    {
+        Digit = digit;
+    }
+}
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