2021GOST R IEC 60793-2-40-2021 Optical fibres. Part 2-40. Product specifications. Sectional specification for category A4 multimode fibres
1970GOST R IEC 60793-2-50-2018 Optical fibres. Part 2-50. Product specifications. Sectional specification for class B single-mode fibres
2017GOST R IEC 60793-2-60-2017 Optical fibres. Part 2-60. Product specifications. Sectional specification for category C single-mode intraconnection fibres