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 ?
The modules include a redundant management switch module (MSM), a 24-port Gigabit Ethernet fiber module, and a 48-port Gigabit Ethernet 1000Base-T card.
3-compliant technologies such as 10BASE-T, 100BASE-TX and 1000BASE-T.
The 10G system reduces alien crosstalk to a level of approximately 15 dB, 30 times lower than the ANEXT performance for 1000Base-T at 100 meters.
The Actius AL3D also offers 10Base-T/100Base-TX/ 1000Base-T (Gigabit), LAN for superfast wired networking, a 56kbps (V.
Based on Marvell's Alaska Gigabit Ethernet PHY, the Finisar FCM-8519-3 offers GBIC support for 1000BASE-T on CAT 5 UTP copper media.
Other features include integration with PMD sub layers to support 10BASE-T, 100BASE-TX and 1000BASE-T Ethernet protocols and a single Quad TX-Transformer interface for all speeds.
SyKonnect, a manufacturer of high-end server network interface cards for strategic network links, has developed the 1000Base-T based Gigabit Ethernet server adapters.
Fully compliant to EEE for 1000BASE-T and 100BASE-TX
The HP 1000Base-T LAN adapter, now available worldwide for HP 9000 PCI-based servers, provides 1000Mb/s bandwidth over existing copper wire.
Fully compliant to Energy Efficient Ethernet for 1000BASE-T and 100BASE-TX as defined by the IEEE Std 802.
Notably, Bel's SFP-1GBT-03 part operates at 610mW (typical in 1000BASE-T applications) and 320mW (typical in 10/100Base-T applications) for unsurpassed cost and performance efficiency.