Teleprotection systems must isolate faults very quickly to preventing damage to the network and power outages. The IEEE committee defined the C37.94 as a optical fibre interface to providecommunications between relays and multiplexers.

Use xGenius and Zeus to analyaze GOOSE which is a IEC 61850 messaging system used by IEDs and mission critical applications to tell about substation events , such as commands, alarms, indications and measurements.