Siemens SCALANCE X101-1 Commissioning Manual page 83

Reconfiguration Time
Time required to restore a functional configuration in case of a device failure or an
interruption of a connection line.
Redundancy Manager (RM)
Switch in a ring topology which does not forward frames between its ring ports in case of
functioning connections between all other switches. As soon as a connection between two
switches is interrupted, the redundancy manager forwards frames between its ring ports to
re-establish an intact connection between all switches.
Ring Port
Two ports in a switch via which it is connected with other switches to form a ring. One switch
in the ring must be configured as redundancy manager. This switch sends test frames via
the ring ports that are forwarded by all ring ports of other switches in the ring. This ensures
that the ring does not have any interruptions.
Segment
In the Ethernet bus system, the transceivers connected over the bus cable along with the
nodes connected over patch cables form a segment. Several such segments can be
connected via repeaters. When using twisted pair and fiber-optic cables, each subsection
forms one segment.
Signaling Contact
Floating relay contact via which detected error/fault states are signaled.
Store and Forward
An entire frame is received, its validity checked (checksum, length etc.) and then buffered.
Invalid frames are discarded, i.e. a frame is forwarded only if it is error-free.
TP Port
Port with TP connector (RJ-45 jack)
Industrial Ethernet Media Converters SCALANCE X-100 Series
Commissioning Manual, 07/2008, A2B00051521A
Glossary
Glossary-3