Operating instructions

Glossary
Glossary-5
SIMATIC NET Twisted-Pair and Fiber-Optic Networks
C79000-G8976-C125-02
IEEE 802.3u
Institute of Electrical and Electronics Engineers
Fast Ethernet working group
IP 20
Degree of protection complying with DIN 40050: Protection against touching with
fingers and against the penetration of solid foreign bodies with more than 12 mm
∅.
ITP
Industrial Twisted Pair; bus system based on the Twisted Pair standards IEEE
802.3i: 10BASE-T and IEEE 802.3j: 100BASE-TX for industrial application.
ITP standard cable
A twisted pair cable for industrial application complying with Category 5 with a
particularly dense shield.
Load containment
Due to its filtering function, a bridge or switch ensures that local data traffic
remains local. The local network load of a segment is contained in the originating
segment and does not represent extra load on the remainder of the network.
Link Class
The link class describes the quality of a complete link from the active component
to the DTE (patch cord, patch panel, installation cable, telecommunication outlet,
connecting cable). This link must meet the value specified in the structured
cabling standard ISO/IEC 1180.
In contrast to this, there is also the specification regarding ”categories”, where
only requirements of products are defined, for example cable according to
Category 5. The suitable interaction of components of a link is ignored.
MAN
Metropolitan Area Network
Data network with the geographical span of a city or town
Medium redundancy
Redundancy in the network infrastructure (cables and active components such
as OLMs or OSMs/ORM)
NIC
Network interface card