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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.
SNMP
Simple Network Management Protocol. Standardized protocol for transporting network
management information.
Store and forward
An entire frame is received, its validity checked (checksum, length etc.) and then buffered.
Invalid frames are discarded, in other words, a frame is forwarded only when it is error-free.
TP
Twisted Pair
TP port
Port with a TP connector (RJ-45 jack)
SCALANCE X-100
Operating Instructions, 04, A2B00060666D
Glossary
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