Long Reach Ethernet

Long Reach Ethernet

Long Reach Ethernet (LRE) is a proprietary networking protocol developed by Cisco, intended to support multi-megabit (5 to 15 Mbit/s) performance over telephone-grade Category 1/2/3 wiring over distances up to 5,000 feet (1.5 km).

Supporting such great distances, LRE is technically classified a Metropolitan area network (MAN) technology. Technically the protocol is similar to VDSL.

The technology is sometimes referred to as Ethernet in the First Mile (EFM).

In addition to Cisco, several networking vendors currently offer networking hardware compatible with Cisco LRE.

Note: Cisco no longer produce LRE switches.

Applications

Like standard VDSL, LRE would allow existing telephone wiring that connects an organization's offices to be used to network those offices together using standard Ethernet protocol without incurring the huge cost of deploying fiber optic cable or limiting organizations to the bandwidth provided by modems or xDSL devices.

Other sample applications include providing standard Ethernet access to hotel rooms or college dormitories over existing installed telephone wiring.

CISCO LRE is compatible with VDSL ETSI Band Plan 998.

CISCO LRE uses Catalyst switch and Infineon PEF22822/PEB22811 VDSL QAM (10Base-S) chipset like many other VDSL concentrators.

CISCO announced end-of-sale for the LRE products at October 2006. Currently, VDSL is a comparable or better solution.

External links

* [http://www.cisco.com/warp/public/779/servpro/solutions/long_ethernet/ What is Long-Reach Ethernet Networking?] , Cisco, Fri, 12 April 2002
* [http://www.metanoia.com.tw Metanoia communications Inc. Taiwan]


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Long Reach Ethernet — (LRE) ist ein proprietäres Verfahren der Firma Cisco zur Erweiterung der Ethernettechnologie. Es ermöglicht, einen Ethernetanschluss nach IEEE Standard 802.3 über normale Kupfer Doppelader (Telefonanschlusskabel) mit Datenraten zwischen… …   Deutsch Wikipedia

  • Ethernet powerlink — является детерминированным в режиме реального времени протоколом для стандартного Ethernet. Это открытый управляемый протокол Ethernet POWERLINK Standardization Group (EPSG). Он был введен австрийской автоматизационной компанией B R в 2001 году.… …   Википедия

  • Ethernet extender — An Ethernet extender (also network extender or LAN extender) is any device used to extend an Ethernet or network segment beyond its inherent distance limitation which is approximately 100 metres (330 ft) for most common forms of twisted pair …   Wikipedia

  • Ethernet — Кабель UTP с разъемом 8P8C (ошибочно называемый RJ 45), используемый в Ethernet сетях стандартов 10BASE T, 100BASE T(x) и 1 …   Википедия

  • Ethernet in the First Mile — (EFM), also known as IEEE 802.3ah, is a collection of protocols specified in IEEE 802.3, defining the Ethernet in the access networks, i.e. first or last mile.With Wide, Metro and Local Area Networks already standardized, the EFM allows… …   Wikipedia

  • Ethernet — im TCP/IP‑Protokollstapel: Anwendung HTTP IMAP SMTP DNS … Transport TCP UDP Internet …   Deutsch Wikipedia

  • Ethernet — An 8P8C modular connector (often called RJ45) commonly used on cat 5 cables in Ethernet networks Ethernet   …   Wikipedia

  • Ethernet crossover cable — Gigabit T568B crossover cable ends An Ethernet crossover cable is a type of Ethernet cable used to connect computing devices together directly. Normal straight through or patch cables were used to connect from a host network interface controller… …   Wikipedia

  • Ethernet frame — A data packet on an Ethernet link is called an Ethernet frame. A frame begins with Preamble and Start Frame Delimiter. Following which, each Ethernet frame continues with an Ethernet header featuring destination and source MAC addresses. The… …   Wikipedia

  • Ethernet over twisted pair — cable (upper) and 8P8C plug (lower) Ethernet over twisted pair technologies use twisted pair cables for the physical layer of an Ethernet computer network. Other Ethernet cable standards employ coaxial cable or optical fiber. Early versions… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”