/// <summary>
        /// Starts the DTMF signalling.
        /// </summary>
        public void StartDtmfSignal(DtmfNamedEvents signal)
        {
            MediaHandlers.StartDtmf(signal);

            if (SelectedCall == null)
            {
                return;
            }

            SelectedCall.StartDTMFSignal(signal);
        }
        /// <summary>
        /// This will be called when the other party started DTMF signaling.
        /// </summary>
        private void Call_DtmfStarted(object sender, VoIPEventArgs <DtmfInfo> e)
        {
            int signal = e.Item.Signal.Signal;

            MediaHandlers.StartDtmf(signal);
        }