ABB i-bus EIB FM/E 1.1 Mode D'emploi page 23

Connection
System 0 – Repeater off
System 1 – Repeater off
System 2 – Repeater off
System 3 – Repeater off
System 4 – Repeater off
System 5 – Repeater off
System 6 – Repeater off
System 7 – Repeater off
System 0 – Repeater on
etc.