Gigabit Ethernet

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Gigabit Ethernet

An Ethernet standard that transmits at 1 gigabit per second. Gigabit Ethernet (GbE, GE) connects PCs and servers in local networks and is commonly employed along with a mix of 10/100 Mbps devices. For example, a 10/100/1000 switch supports all three rates and adjusts to the highest speed between sender and receiver. All new computers and most network devices support Gigabit Ethernet.

GbE transmits full duplex from point to point using Ethernet switches and half duplex in a shared Ethernet hub environment (see CSMA/CD).

IEEE 1000Base-T (802.3ab)
The 1997 standard (IEEE 802.3z) required multimode fiber or shielded copper cables, but two years later, 1000Base-T enabled GbE to run on ordinary Cat 5 copper and be readily used in existing networks. Four wire pairs each transmit 250 Mbps in both directions.

TIA 1000Base-TX
A competing standard created by the TIA that never caught on used simpler electronics but required Cat 6 cabling. However, 1000Base-T is often erroneously labeled 1000Base-TX. See Ethernet and 10 Gigabit Ethernet.

COPPER CABLEEncoding   Cable  RangeStandard     Method     Type  (meters)1000Base-T802.3ab      4D-PAM5  Cat5-UTP  100

   1000Base-TXTIA/EIA-854  4D-PAM5  Cat6-UTP  100

   1000Base-CX802.3z       8B/10B   Cat1-STP   25


   OPTICAL CABLE (8B/10B Encoding)Fiber            ModalDiameter       Bandwidth   Range(microns)      (MHz-km)   (meters)1000Base-SX 802.3z
   62.5 multimode   160        220
   62.5 multimode   200        275
   50 multimode     400        500
   50 multimode     500        550

   1000Base-LX802.3z
   62.5 multimode   500        550
   50 multimode     400        500
   50 multimode     500        550
    9 singlemode    ---       5000
References in periodicals archive ?
8 /PRNewswire/ -- DPS Telecom, a leading developer of network alarm monitoring solutions, announced today the release of their new Gigabit Fiber 1000BaseT interface RTU, the NetGuardian 216F.
The CISPR 22-based coupling/decoupling network is ideal for use with applications employing up to 1000BaseT operation, Power over Ethernet (PoE) and immunity tests of office, telecom and networking equipment according to IEC 61000-4-6.
Teseq's new ISN T8 coupling/decoupling network is ideal for use in applications employing up to 1000BaseT operation and Power over Ethernet (PoE).
Using a four-port 1000BaseT Ethernet card, the Nokia IP560 supports 58,000 connections per second and delivers over 6 Gbps of firewall throughput and 1.
Model Number Description CGETF1035-105 1000BaseT RJ45 - 1000BaseLX 1550nm SM SC (125KM) Point System card SGETF1035-105 1000BaseT RJ45 - 1000BaseLX 1550nm SM SC (125KM) stand alone CFMFF1335-220 1000BaseSX 850nm MM SC (220m) - 1000BaseLX 1550nm SM SC (125KM) Point System card SFMFF1335-220 1000BaseSX 850nm MM SC (220m) - 1000BaseLX 1550nm SM SC (125KM) stand alone