/// <summary>
/// 发送DTMF key
/// </summary>
/// <param name="key">DTMFkey</param>
public void SendDTMFKey(DTMFKey key)
{
var errno = PlcmProxy.SendDTMFKey(this.CallHandle, key);
if (errno != ErrorNumber.OK)
{
var errMsg = string.Format("发送DTMF Key({0})失败，errno={1}", key, errno);
log.Error(errMsg);
throw new Exception(errMsg);
}
log.Info(string.Format("发送DTMF Key({0})成功.", key));
}