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The resulting standards are named 2.5GBASE-T and 5GBASE-T. [ 1 ] [ 2 ] [ 3 ] NBASE-T refers to Ethernet equipment that supports speeds of at least 2.5 Gbit/s and sometimes 5 or 10 Gbit/s , and that can automatically use training to operate at the best speed supported by the cable quality. [ 4 ]
5GBASE-T: 100 m of Cat 6 2.5GBASE-T1: 802.3ch-2020 (149) use a single, bi-directional twisted pair in full duplex mode only, intended for automotive and industrial applications 5GBASE-T1 Fiber-optical cable 2.5GBASE-AU: 802.3cz-2023 (166) undefined: up to 40 m of OM3 for automotive 5GBASE-AU: up to 40 m of OM3 for automotive Other 2.5GBASE-KX
[29] [30] Higher speed standards, 2.5GBASE-T up to 40GBASE-T [31] running at 2.5 to 40 Gbit/s, consequently define only full-duplex point-to-point links which are generally connected by network switches, and do not support the traditional shared-medium CSMA/CD operation.
Unlike most non-SFP, copper 1000BASE-T ports integrated into most routers and switches, 1000BASE-T SFPs usually cannot operate at 100BASE-TX speeds. 100 Mbit/s copper and optical – some vendors have shipped 100 Mbit/s limited SFPs for fiber-to-the-home applications and drop-in replacement of legacy 100BASE-FX circuits.
2.5 Gbit/s and 5 Gbit/s Operation over Backplane 802.3cc 2017-12 25 Gbit/s over Single-Mode Fiber 802.3cd 2018-12 Media Access Control Parameters for 50 Gbit/s and Physical Layers and Management Parameters for 50, 100, and 200 Gbit/s Operation 802.3ce 2017-03 Multilane Timestamping 802.3.2-2019 2019-03 802.3cf, YANG Data Model Definitions
It uses 64/66b encoding and lowers the MAC rate to 9.95 Gbit/s, so that is compatible with SONET STS-192c data rates and SDH VC-4-64 transmission standards when wrapped into a SONET frame. 10GBASE-T for twisted pair copper splits the data into four lanes and uses 64B/65B encoding, scrambling, and 128 double-square (DSQ128) checkerboard encoding ...
IEEE 802.2: LLC: Disbanded IEEE 802.3: Ethernet: Active [4] IEEE 802.4: Token bus: Disbanded IEEE 802.5: Token Ring MAC layer: Disbanded IEEE 802.6: MANs : Disbanded IEEE 802.7: Broadband LAN using Coaxial Cable: Disbanded IEEE 802.8: Fiber Optic TAG: Disbanded IEEE 802.9: Integrated Services LAN (ISLAN or isoEthernet) Disbanded IEEE 802.10 ...
The first such word is known as a base link code word, and its bits are used as follows: 0–4: selector field – indicates which standard is used between IEEE 802.3 and IEEE 802.9; 5–12: technology ability field – a sequence of bits that encode the possible modes of operations among the 100BASE-T and 10BASE-T modes (see below)