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BEGINNING	TECHNOLOGY	SERVICES	DEVELOPMENT	NORM

NORM

 

The popularización of FTTH has been possible thanks to the work of multiple institutions and groupings of manufacturers, who working together, have been able to resolve the initial problems and to settle down common standards of operation.

The most outstanding groupings are: FTTH Council (http://www.ftthcouncil.org/) in the equivalent United States and their Asian (http://www.ftthcouncilap.org/) and European (http://www.europeftthcouncil.com)

Next we will see a brief reference to norms of international telecommunications and national legislation that are applied in the unfolding of networks óbtica fiber.

 

Fig: Countries associated to the European advice of FTTH.

Norms of wiring.

The legal considerations to consider in the unfoldings of wiring in the home:

  Real Decree 401/2003, of 4 of April, by that the Regulating Regulation of Common Infrastructures of Telecommunication is approved, is the regulation at the moment in use for the installation of wiring in the homes.

In Order ITC/1077/2006, of 6 of April,  some technical and administrative modifications were made that to be gathered in RD 401/2003.

In addition to the wiring standards, it is necessary to consider that the cables are means that can burn, and therefore also are subject to security norms, in this sense, the installed cables must be retardants of the flame and to have international certifications like (UL or ETL)

A classification of cables according to its behavior exists before the flame. Cables CMX are the minuses retardants and cables COP/CMP Plenum, those of better characteristic as retardants of the flame

• Cables Type CMX: The metallic cables for use in metallic pipes where cable concentration does not exist, nor forced air flow.
• Cables Type COG/CM: The metallic cables (CM) or optician (COG) are of general use. Adapted it stops most of the applications like internal facilities in central telephone offices, horizontal wiring, commercial buildings, etc
• Cables Color/CMR Type: The metallic cables (CMR) or optician (COR), of type RISER, are for conduits of elevation for facilities in which the cables exceed more of a floor.
• Cables Type COP/CMP: ideal ables for horizontal wirings. The cables classified like PLENUM, fulfill the norm UL910, the one that verifies the propagation of the flame and the density of the smoke.
• Cables Type LSZH: Cables with the technology of materials LSZH (Low Smoke Zero Halogen) that during the process of burns present/display a low smoke-screening and they do not generate gases toxic, increasing the security.

 

Next is a summary of the norms:

	Resistencia a la llama	Propagación del incendio	Emisión de humos
Internacional	IEC-331	IEC-332-1 No propagación llama IEC-332-2-C No propagación del incendio	IEC 754-1 IEC 754-2 IEC 1034-1 IEC 1034-2 IEC 2037-2
España	UNE 20431	UNE 50265-1 (Antes UNE 20432-1) UNE 50266 (Antes UNE 20432-3)	UNE 50267 (Antes UNE 21147-1) UNE 50267 (Antes UNE 21147-2) UNE 50268-1 (Antes UNE 21172-1) UNE 50268-2 (Antes UNE 21172-2)

 

Technical norm.

The organizations of normalization of the European organisms are mainly CEN, CENELEC and ETSI and international IEC and ISO. It is Spain, the adaptation of the norms published to the Spanish scope corresponds to AENOR.

In this section the international standards stand out more concretely from the technical point of view on which FTTH is based and the transmission technology on which it is sustained, the optical fiber.

The norm is interminable, and exist a norm for practically each material, cable, method of measurement and type of connector, which surpasses the objective of this document, for example:

IEC 61300-3-34: Passive devices of optical fiber interconnection and components. Tes basic and procedures of measurement. Examination and measures.

IEC 60794-1-1: Optical fiber cables. General specifications.

IEC 62221: Optical fibers. Methods of measurement. Sensitivity to microdobleces.

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