Siemens OSM User Manual Page 154

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Glossary
Glossary-7
Industrial Ethernet OSM/ESM Network Management
C79000-G8976-C137-08
Signaling contact
Binary contact used with SIMATIC NET network components to signal fault
events.
SMTP server
(Simple Mail Transfer Protocol Server) computer that receives sent mails and
passes them on to the recipient.
SNMP
Simple Network Management Protocol, nonproprietary LAN management
standard.
Standby cable
Connecting cable (ITP XP standard cable 9/9) for linking the standby master and
standby slave in a redundant coupling.
Standby configuration error
Error in the configuration of the redundant coupling, see /1/, for example faulty or
undetected standby connecting cable.
Standby master
An OSM/ESM in the redundant coupling that handles the coupling of the
connected networks in normal operation.
Standby mode
This is activated by a DIP switch on the OSM/ESM and indicates whether or not
an OSM/ESM is operating as the standby slave (Stby on).
Standby slave
An OSM/ESM in the redundant coupling that takes over the coupling of the
attached networks if an error occurs.
Standby status
This indicates whether or not the standby master or the standby slave has taken
over the coupling of the connected networks in the redundant coupling. Standby
active: The device has taken over the coupling. Standby passive: The device has
not taken over the coupling.
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