Jump to content

Classic Ethernet

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by 2607:f2c0:93f9:3b00:49e2:5d29:74f4:583f (talk) at 02:01, 3 February 2021 (Add paragraph about 10BASE-T1S and -T1L.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Classic Ethernet is a family of 10 Mbit/s Ethernet standards, which is the first generation of Ethernet standards. In 10BASE-X, the 10 represents its maximum throughput of 10 Mbit/s, BASE indicates its use of baseband transmission, and X indicates the type of medium used.

Two new variants of 10 megabit per second Ethernet over a single twisted pair, known as 10BASE-T1S and 10BASE-T1L, were standardized in IEEE Std 802.3cg-2019.[1] 10BASE-T1S has its origins in the automotive industry and may be useful in other short-distance applications where substantial electrical noise is present. 10BASE-T1L is a long-distance Ethernet, supporting connections up to 1 km in length. Both of these standards are finding applications implementing the Internet of things.

Varieties

Name Standard Status Media Connector Transceiver Module Reach (km) # Media Lanes (⇅) Notes
Classic Ethernet - (Data rate: 10 Mbit/s - Line code: PE - Line rate: 20 MBd - Full-Duplex / Half-Duplex)
10BASE5
Thick Ethernet
DIX Standard 		802.3-1983
(CL8) 		obsolete
09/2003 		Coax
RG-8X
(50 Ω) 		AUI,
N,
Vampire tap 		MAU 0.5 1 1 LAN; original standard;
electrical bus topology with collision detection;
uses a single coaxial cable into which you literally tap a connection by drilling into the cable to connect to the core and screen.
10BASE2
Thin Ethernet
ThinNet
Cheapernet 		802.3a-1988
(CL10) 		obsolete
09/2011 		Coax
RG-58
(50 Ω) 		BNC,
EAD/TAE-E 		0.185 1 1 LAN; dominant standard from the mid to late 1980s;
electrical bus topology with collision detection;
coaxial cable connects machines together, each machine using a T-connector to connect to its NIC. Requires terminators at each end.
10BASE-T 802.3i-1990 largely obsolete Twisted pair
(Cat 3 and above)
(100 Ω) 		8P8C 0.1 2 1
FOIRL 802.3d-1987
(CL9.9) 		superseded Fiber
850 nm 		ST OF: 1 2 1 original standard for Ethernet over fiber;
uses any optical fiber with up to 4 dB/km attenuation and at least 150 MHz bandwidth;
superseded by 10BASE-FL
10BASE-FL 802.3j-1993
(CL15/18) 		largely
obsolete 		Fiber
850 nm 		ST FDDI: 2 2 1 Nodes
10BASE-FB 802.3j-1993
(CL15/17) 		largely
obsolete 		Fiber
850 nm 		ST FDDI: 2 2 1 synchronous inter-repeater connections
10BASE-FP 802.3j-1993
(CL15/16) 		obsolete Fiber
850 nm 		ST FDDI: 1 2 1 passive, repeaterless star network;
Market Failure, never implemented

10BASE-F

10BASE-F, or sometimes 10BASE-FX, is a generic term for the family of 10 Mbit/s Ethernet standards using fiber optic cable. In 10BASE-F, the 10 represents a maximum throughput of 10 Mbit/s, BASE indicates its use of baseband transmission, and F indicates that it relies on medium of fiber-optic cable. The technical standard requires two strands of 62.5/125 µm multimode fiber. One strand is used for data transmission while the other is used for reception, making 10BASE-F a full-duplex technology. There a three different variants of 10BASE-F: 10BASE-FL, 10BASE-FB and 10BASE-FP. Of these only 10BASE-FL experienced widespread use.[2] With the introduction later standards 10 Mbit/s technology has been largely replaced by faster Fast Ethernet, Gigabit Ethernet and 100 Gigabit Ethernet standards.

10BASE-FL

10BASE-FL is the most commonly used 10BASE-F specification of Ethernet over optical fiber. In 10BASE-FL, FL stands for fiber optic link. It replaces the original fiber-optic inter-repeater link (FOIRL) specification, but retains compatibility with FOIRL-based equipment. When mixed with FOIRL equipment, maximum segment length is limited to FOIRL's 1000 meters.[2]

10BASE-FB

The 10BASE-FB is a network segment used to bridge Ethernet hubs. Here FB abbreviates FiberBackbone. Due to the synchronous operation of 10BASE-FB, delays normally associated with Ethernet repeaters are reduced, thus allowing segment distances to be extended without compromising the collision detection mechanism. The maximum allowable segment length for 10BASE-FB is 2000 meters. This media system allowed multiple half-duplex Ethernet signal repeaters to be linked in series, exceeding the limit on the total number of repeaters that could be used in a given 10 Mbit/s Ethernet system. 10BASE-FB links were attached to synchronous signaling repeater hubs and used to link the hubs together in a half-duplex repeated backbone system that could span longer distances.[2]

FOIRL

Fiber-optic inter-repeater link (FOIRL) is a specification of Ethernet over optical fiber. It was especially designed as a back-to-back transport between repeater hubs as to decrease latency and collision detection time, thus increasing the possible network radius. It was replaced by 10BASE-FL.[2]

10BASE-FP

In 10BASE-FP, FP denotes Fibre Passive. This variant calls for a non-powered signal coupler to act as optical signal couplers capable of linking up to 33 devices, with each segment being up to 500 m in length. This formed a star-type network centered on the signal coupler. There are no devices known to have implemented this standard.[2][3]

References

  1. ^ "PhysicalLayers Specifications and Management Parameters for 10 Mb/s Operation and Associated Power Delivery over a Single Balanced Pair of Conductors". IEEE 802.3.
  2. ^ a b c d e Charles E. Spurgeon (2014). Ethernet: The Definitive Guide (2nd ed.). O'Reilly Media. ISBN 978-1-4493-6184-6.
  3. ^ Parker, Tim (2000-07-10). "Obscure standard may make you flip for fibre". ProQuest Computer Science Journals. 13 (11). Rogers Publishing Limited. ProQuest 274984076.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Classic_Ethernet&oldid=1004532722"