Glossary
SCALANCE X-300
Operating Instructions, 10/2010, A5E01113043-10
287
RMON
Remote Monitoring. RMON-compliant devices allow diagnostic data to be collected on the
device and read out by a network management station. This means that network problems
are detected early and can be eliminated. The particular advantage of RMON is that it is
independent of location. The acquired data can be analyzed at any point in the network with
suitable reporting software.
Segment
In the Ethernet bus system, transceivers connected together 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 a segment.
SFP
→
Small Form Factor Pluggable (SFP)
SFP media module
Only the SFP media module may be fitted with SFP transceivers. The SFP media module
can be fitted with up to two SFPs.
Signaling contact
Floating relay contact via which the detected error states can be signaled.
Single mode
In single mode transmission, (and monomode transmission) the pulse is transmitted by a
straight mode (wave). Attenuation is mainly caused by physical absorption and dispersion as
well as by mechanical bending. The amount of attenuation depends, among other things, on
the wavelength of the input light. The single mode fiber typically has a core diameter of 5 to 9
µm. The outer diameter is, however, once again 125 µm (compare multimode). The smaller
core diameter degrades the pulse edges less than multimode transmission and allows
greater transmission distances.
Slot
→
Module slot
Small Form Factor Pluggable (SFP)
An SFP is a pluggable, compact transceiver for network connections. With SCALANCE X, an
SFP transceiver may be plugged only into the → SFP media module.
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