ABB 2TMA130050B0055, Руководство пользователя

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Overview
System Manual │9
A Location distributor
B Building distributor
C Floor distributor
D Connection unit
E Terminal device
1 Optical fibre
2 Copper conductor
3 Primary area
4 Secondary area
5 Tertiary area
6 Tertiary area including patch cable
Table 2: Structured cabling
In the European standard (EN) and the globally valid ISO standard, structuring is carried out in
the form of hierarchical levels. These levels are formed by groups. These groups are joined
topologic and administrative.
Cabling is divided into the following areas:
■
Site cabling (primary cabling)
■
Building cabling (secondary cabling)
■
Floor cabling (tertiary cabling)
The cabling standards are optimized for the following geographic expansion:
■
Expansion: 3000 m,
■
Area: 1,000,000 sqm
■
Users: 50 - 50,000
Maximum admissible cable lengths have been specified in every cabling sector and must be
adhered to during installation. Many transmission techniques refer to the defined cable lengths
and quality requirements.
Notice
All ISO standards are recommendations for handling. The adherence to the ISO
standard is voluntary. Adherence to the ISO standards my be demanded by
different parties, such cooperation partners, manufacturers and customers.