On registration of a new subscriber in a radio system with a central
system and a plurality of subscribers the new subscriber first sends a
search telegram to all the subscribers that it can reach in its radio
range and selects from the subscribers that respond a first router. Via
this router it sends a registration request in the form of a message with
a provisional own address to the central system. If it accepts the
registration request the central system sends a response telegram via the
router which contains a subscriber number and a system identifier for the
new subscriber, which is integrated when the subscriber number is
accepted into the radio system.