A bridging system for a communication system comprises a first gateway (107)
and a second gateway (108) arranged to communicate with each other. Each
gateway (107, 108) is connectable to a different bus (100, 105) of
the communication system. The first gateway (107) is operative to communicate
details of available devices (102, 103) on its respective bus (100)
to the second gateway (108). The second gateway (108) is operative
to generate at least one proxy element corresponding to each of said available
devices (102, 103). Each proxy element is operative to communicate data
and messages between devices (130) on the bus (105) of the second
gateway (108) and the device on the first gateway (100) corresponding
to the proxy element.