Compared to hardwired systems, wireless systems are much more convenient to install and present more flexibility of course. In some applications you nevertheless come up against the range limits of wireless. This is where routing methods are generally used, in other words the wireless telegrams are conducted to their destination through a network of wireless components. In the simplest case the latter will be repeaters, forwarding all received telegrams, whilst in more complex cases the optimal routes are calculated in advance and held as tables in the memory of the individual wireless nodes.