private void OnReceivedGroupTelegram(int address, int routing, Priority priority, object data, GroupTelegramTypes type)
 {
     GroupTelegram gt = new GroupTelegram(address, data, DateTime.Now, routing, (int)priority, type);
     if (ReceivedGroupTelegram != null)
         ReceivedGroupTelegram(this, new ReceivedGroupTelegramEventArgs(gt));
 }
 internal abstract void ReceiveTelegram(GroupTelegram telegram);