LEADER 02317nam 2200373 450 001 9910513606003321 005 20231213215822.0 010 $a1-5044-8236-0 024 7 $a10.1109/IEEESTD.2021.9650819 035 $a(CKB)4100000012162908 035 $a(NjHacI)994100000012162908 035 $a(EXLCZ)994100000012162908 100 $a20231213d2021 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$a8802-3:2021/Amd9-2021 - IEEE/ISO/IEC International Standard-Telecommunications and exchange between information technology systems - Requirements for local and metropolitan area networks - Part 3 $eStandard for Ethernet AMENDMENT 9: Physical layer spe /$fInstitute of Electrical and Electronics Engineer 210 1$a[Place of publication not identified] :$cIEEE,$d2021. 215 $a1 online resource (270 pages) 330 $aThis amendment to IEEE Std 802.3-2018 extends the operation of Ethernet passive optical networks (EPONs) to multiple channels of 25 Gb/s providing both symmetric and asymmetric operation for the following data rates downstream/upstream: 25/10 Gb/s, 25/25 Gb/s, 50/10 Gb/s, 50/25 Gb/s, and 50/50 Gb/s. This standard specifies the 25 Gb/s EPON Multi-Channel Reconciliation Sublayer (MCRS), Nx25G-EPON Physical Coding Sublayers (PCSs), Physical Media Attachment (PMA) sublayers, and Physical Medium Dependent (PMD) sublayers that support both symmetric and asymmetric data rates while maintaining backward compatibility with already deployed 10 Gb/s EPON equipment. Backward compatibility with deployed 1G-EPON and ITU-T G.984 GPON is maintained with 25GBASE-PQ for the specific case of 1G-EPON and GPON ONUs using reduced-band (40 nm) lasers. The EPON operation is defined for distances of at least 20 km, and for a split ratio of at least 1:32. 517 $a8802-3 606 $aLocal area networks (Computer networks) 606 $aLocal area networks (Computer networks)$vPeriodicals 615 0$aLocal area networks (Computer networks) 615 0$aLocal area networks (Computer networks) 676 $a004.68 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a9910513606003321 996 $a8802-3:2021$91997474 997 $aUNINA