The NxS switches enable backbones in line structures to be built up. Cascading is carried out using the backbone ports.
With the redundancy manager function of the NxS modules you can close the two ends of a line structured backbone to a redundant ring. The NxS switches are integrated into the ring via the backbone ports (ports 6 and 7). If one section becomes inoperable the reaction time comes to less than 0.5 s at up to 50 NxS modules being cascaded.
Redundant Coupling of Network Segments
The built-in control intelligence of the NxS allows the redundant coupling of network segments.
The connection of two network segments is realized via two separate paths. The NxS switches in the redundant line get the redundancy function assigned by the DIP switch setting standby.
The NxS modules in the redundant line and the NxS switches in the main line share their operating states via the control line (crossover Ethernet cable).
If the communication can not be established on the main line the redundant NxS modules enable the redundant line within 0.5 s. If the main line is okay again, the NxS switches in the main line inform the redundant Nxs modules about this. The main line will be enabled and the redundant line will be disabled within 0.5 s.
The following figure shows an optical line structure.
The following figure shows a redundant ring structure.
The following figure shows a redundant coupling of optical rings.
