Small Form Factor (SFF) Fiber Connectors

In March of 2000, the TIA TR-42 Engineering Committee unanimously approved the publication of the ANSI/TIA/EIA-568-B.3 Optical Fiber Cabling Components Standard. This document is part three in a series of telecommunications Standards being developed to supersede the TIA/EIA-568-A (‘568-A) Commercial Building Cabling Standard. When complete, the third edition of TIA’s Commercial Building Telecommunications Cabling Standard will include:

 TIA/EIA-568-B.1 (‘568-B.1), General Requirements

 TIA/EIA-568-B.2 (‘568-B.2), 100 ohm Balanced Twisted- Pair Cabling

 TIA/EIA-568-B.3 (‘568-B.3), Optical Fiber Cabling Components

Table 2

Latest Industry Draft Category 6/Class E and Category 7/Class F Channel Transmission Parameters
Parameter	Category 6/Class E VALUE AT 100 MHZ (250 MHZ)	Category 7/Class F VALUE AT 100 MHZ (600 MHZ)	PERCENT VOLTAGE IMPROVEMENT OVER CATEGORY 6/CLASS E
Insertion Loss (Attenuation)	21.3 dB (36.0 dB)	20.8 dB (54.6 dB)	10% less attenuation
NEXT Loss	39.9 dB (33.1 dB)	62.9 dB (51.2 dB)	93% less NEXT
Return Loss	12 dB (8 dB)	12 dB (4 dB)	-
ELFEXT	23.2 dB (15.3 dB)	29 dB (ffs)	15% less ELFEXT
ACR	18.6 dB (-2.9 dB)	42.1 dB (-3.4 dB)	n/a
PSACR	15.8 dB (-5.8 dB)	39.1 dB (-6.4 dB)	n/a

The content of 568-B.3 addresses the mechanical and transmission performance requirements of optical fiber cable, connecting hardware, and patch cords. The two most significant enhancements over '568-A include the recognition of 50/125 µm multimode fiber and the use of small form factor (SFF) fiber connectors in addition to the 568SC at the work area connection. It is interesting to note that, even though the ISO committees recognize the use of 50/125 µm multimode fiber in their Standards, they intend to maintain the duplex SC-connector as the only fiber optic connector recognized for use at the work area. Both TIA and ISO recognize the use of any compliant fiber optic connector at all locations other than the work area.

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Цветовое кодирование (определено в документах ICEA)	\|	Table 3

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