For the standardization of structured cabling, there are activities and draft standards from U.S., international, European and German bodies. The umbrella organizations Electronics Industry Association( EIA) and Telecommunications Industry Association( TIA) started standardization for universal building c abling as early as 1985 for the USA, which was published in 1991 under the title "Commercial Building Telecommunications Wiring Standard" EIA/TIA 568.
International standardization activities began in 1991. The first draft of the international standard ISO/IEC11801 was available in 1993 and published in 1995. This international standard gave rise to the European standardEN 50173 and the German DIN version 50173 in November 1995. The 11801 and 50173 standards are largely identical and relevant for Germany. They define the scope for application-neutral cabling structures in premises cabling, building cabling and floor cabling.
The standards are limited in the transmission media that can be used to fiber optic cables and symmetrical TP cables. The transmission characteristics for the cables, as well as for the connection technology, are specified in so-called link classes, which are identified by the word "Class" followed by one of the letters A, B, C, D, E, or F.
In addition to the aforementioned standards for structured cabling, there are various activities and draft standards from U.S., international and European bodies that address this task in detail. The SC46C working group is responsible for cable technology in the communications sector in the International Electrotechnical Commission ( IEC), and SC46XC in the Comité Européen de Normalisation Electrotechnique( CENELEC). These groups are also the ones that develop and publish the valid cable standards in the in-house sector. The following standards are published in building cabling at international and European level
IEC 61156-1: Compartmental basic specifications
IEC 61156-2: Frame specification for tier cables
IEC 61156-3: Frame specification for equipment connection cables
IEC 61156-4: Frame specification for distribution cables
These international documents specify Category 3, 4 and 5 data cables for both installation cables and backbone cables, as well as for connection and interconnection cables. They are almost identical in their requirements to the earlier European standards HD 608, EN 50167, EN 50168 and EN 50169
EN 50288-x-x is a European series of standards defining the requirements for cables in categories 5 to 7EN 60603-x-x is a European series of standards defining connectors for categories 5 to 7IEC 1156: Generic specification for multicore and symmetrical pair/quad cables for digitalcommunication
HD 608: Generic specification for symmetrical pair/quad or multicore cables for digital communication
EN 50167: Sectional specification for horizontal floor wiring cables with a common overall screen for use in digital communication.
EN 50168: Sectional specification for work area wiring cables with a common overall screen for use in digital communication
EN 50169: Sectional specification for backbone cables, riser and campus with a common overall screen for use in digital communication
For Token Ring installations there is the document:
ISO/IEC 12075: 1994, Information technology, customer premises cabling( CPC), planning and installation guide to support ISO/IEC 8802-5 Token ring stations
Based on EN 50098-1 and EN 50098-2, there are two standards on ISDN cabling:
ISO/IEC 14709-2: 1998, Information technology, configuration of customer premises cabling (CPC) for application, part 1. integrated services digital network (ISDN) primary rate
ISO/IEC 14763-1: 1999, Information technology, configuration of customer premises cabling (CPC) for application, part 1: Administration
ISO/IEC TR 14763-2: 1999, Information technology, configuration of customer premises cabling (CPC) for application, part 2: Planning and installation
ISO/IEC TR 14763-3: 1999, Information technology, configuration of customer premises cabling (CPC) for application, part3: Testing of optical fibre cabling
HD 608, EN 50167, EN 50168 and EN 50169The structure of European standardization is such that the elementary design features and measurement methods are set out in a higher-level standard, the so-called basic technical specification (HD 608). The basic technical specification defines the scope of application, the principles according to which a data cable is to be designed, and specifies the measurement and test procedures.
The so-called design specifications (EN 50167, EN 50168, EN 50169) define the minimum cable requirements. These include the wire thicknesses, the basic structure of the cables, the materials to be used, the shielding and the transmission performance parameters. These requirements can then be incorporated into the detailed specifications.
Compared to the EN 50173 and ISO/IEC 11801 system standards, the European cable standards define shielded cables with halogen-free, low-smoke and flame-retardant sheath materials and wire thicknesses of 0.5 mm and 0.6 mm. For the transmission requirements of the data cables, the category 5 limits of the system standards were adopted. For attenuation, higher requirements were specified for the 0.6 mm wire thickness than prescribed in Category 5. Another difference from the system standards is the attenuation-to- crosstalk ratio( ACR). In the system specifications, the ACR is defined only for communication links via the connector systems. There was no definition for the individual components. In the standard, the ACR is determined from the minimum requirements for near-end crosstalk attenuation( NEXT) and attenuation, i.e. all cables that complied with the Category 5 limits to date meet the specified ACR limits.
EN 50169 essentially corresponds to the specifications of EN 50167, but ACR is not taken into account. EN 50168 defines connecting cables and differs from EN 50167 in its limits. Cables in this range are designed with flexible conductors of 7 x 0.1 mm, 7 x 0.15 mm and 7 x 0.2 mm and have higher attenuation values than installation cables. According to the specifications, the limit values may be 50% higher than for installation cables.
EN 50288 specifies cables in categories 5 to 7.
In EN 61076-3, the Tera connector for category 7 cabling.