International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 50377-17-1:2013
Title Connector sets and interconnect components to be used in optical fibre communication systems - Product specifications - Part 17-1: Type FPFT (factory polished field terminated) simplex connector factory terminated with EN 60793-2-50 category B1.3 fibre and field mounted onto IEC 60793-2-50 category B1.3 or B6a_1 or B6a_2 singlemode fibre, category C
Project Number 23997
Abstract/Scope 1.1 Product definition This European Standard contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements that a Factory Polished Field Terminated (FPFT) single mode simplex connector set (plug adaptor plug), adaptor will meet in order for it to be categorised as an EN standard product. The FPFT is designed for either fusion or mechanical splice methods. The performance is specified for the mated combination between a FPFT plug and an EN standardised plug from the EN 50377 series (configuration 1) or between two FTFP plugs (configuration 2). The fibre specified inside the FPFT plug in this European Standard is standard single mode fibre with low water peak as specified as B1.3, which is field, mated to B1.3 fibre or bend insensitive single mode fibre specified as B6_a1 or B6_a2 in EN 60793-2-50. Mixing standard and bend insensitive fibres in a connection causes a considerable intrinsic attenuation due to mode field diameter mismatch. These connectors are intended to be installed inside wall outlets or other fibre organisers, and are therefore considered as being in a “protected environment” and are terminated onto either 250 μm primary coated or up to 900 μm buffered fibres. Since different variants and grades of performance are permitted, product marking details are given in 3.5. 1.2 Intermateability 1.2.1 Mechanical intermateability In order to meet mechanical performance requirements, the FPFT plug will meet the optical, environmental and mechanical requirements as stated in this European Standard and the mated plug will meet the all requirements of the relevant EN 50377 series for category C. Intermateability between the FPFT plug and its standard EN 50377 counterpart can only be guaranteed when both plugs meet the same EN 50377 product specification mechanical connector interface dimensions and endface geometry requirements. 1.2.2 Optical intermateability In EN 50377 product specifications, the random mated performance is calculated when the two connector plugs have been terminated with single-mode fibres using a worst case MFD. The specified MFD range in fibre standards (e.g. B1.3 fibres) is 8,0 μm to 10,1 μm at 1 310 nm, which causes 0,22 dB worst case intrinsic attenuation. However, in EN 50377 product specification series, the MFD is limited to 8,9 μm to 9,5 μm at 1 310 nm. In this European Standard, in order to achieve the random mate performance values, the total MFD range of bend insensitive fibres, e.g. B6a fibres, is limited to 8,5 μm to 9,5 μm at 1 310 nm. This causes a worst case intrinsic attenuation of 0,05 dB. 1.3 Operating environment The tests selected, combined with the severities and durations, are representative of a category C environment as defined in EN 61753-1. The FPFT plugs are terminated on to 250 µm primary coated or up to 900 µm buffered fibres and are specified to be located in a protected environment. 1.4 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this European Standard does not guarantee the reliability of the product. This should be predicted using a recognised reliability assessment programme. 1.5 Quality assurance Compliance with this European Standard does not guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme.


Current Stage code 6060
Current Stage code date 2013-11-01
Current Stage code deadline 2014-08-26
Deadline date for vote  


Order Voucher  


IEC Technical Body  
Reference Document  
ICS 33.180.20 - Fibre optic interconnecting devices
Keywords FPFT; Connector; Factory; Single mode fibre
Note 2013-01-09 - UAP editing allocated to * Product specification specifically requested by Telecom Italia to meet its market needs * 144 BT requested to approve a change in the title*2013-07-25: Publication allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2013-11-01 2014-08-26 export to doc file  EN  DE
5099 2013-08-26 2013-09-23  
5060 2013-07-22 2013-08-12 export to doc file  EN
5020 2013-02-15 2013-07-19 export to doc file  EN  FR  DE
4099 2013-01-09    
3020 2012-10-03 2012-12-06  
1099 2012-03-06    
1000 2011-12-07 2012-03-06  

Implementation Dates

date of Ratification (DOR) (1) 2013-08-26
date of Availability (DAV) (2) 2013-11-01
date of Announcement (DOA) (3) 2014-02-26
date of Publication (DOP) (4) 2014-08-26
date of Withdrawal (DOW) (5) 2016-08-26


Superseded by  
Normative reference (6)  

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.