Topic Gigabit Ethernet Standards Comparet

IEE802 Group

IEEE 802.3 is a working group and a collection of IEEE standards produced by the working group defining the physical layer and data link layer's media access control (MAC) of wired Ethernet. This is generally a local area network technology with some wide area network applications. Physical connections are made between nodes and/or infrastructure devices (hubs, switches, routers) by various types of copper or fiber cable.

Gigabit Ethernet

The term describes the technologies used to transmit 1 million bits per second (1Gbps) as described by IEEE 802.3-2008 standard. Transmission can be made over copper or fibres and half - duplex or full duplex. The half duplex transmission does not present any more interest in developing being considered an obsolete way.

Initial IEEE standard was developed for fiber mediums: IEE802.3z. It was so called 1000BASE-X.

Gigabit over Copper -1000BASE-T

IEEE 802.3ab, ratified in 1999, defines Gigabit Ethernet transmission over unshielded twisted pair (UTP) category 5, 5e or 6 cabling, and became known as 1000BASE-T. With the ratification of 802.3ab, Gigabit Ethernet became accessible to end users through mass distribution and implementation of computers NIC’s (Network Interface Cards) with RJ45 connector and supporting 1Gbps.

BlueOptics© SFP 1000BASE-T, 100M, Copper Transceiver is suitable for a switch that may be connected with a computer Gigabit NIC.

Copper Interfaces:

Automatic MDI/MDI-X Configuration is specified as an optional feature in the 1000BASE-T standard, meaning that straight-through cables will often work between gigabit-capable interfaces. This feature eliminates the need for crossover cables, making obsolete the uplink/normal ports and manual selector switches found on many older hubs and switches and greatly reduces installation errors.

The corresponding copper cables in the BlueLan category may be:

SCP33SFUR1B6XM - BlueLAN© CAT5e SF/UTP Twisted Pair Patch Cord, 2x RJ45, 1:1 Assignment, LSZH Sheathing, Blue, 26 AWG

Gigabit over Fibre - 1000BASE-X

Transmission over optical fibre is generically summarized in IEEE 802.3z standard. As we have multimode fibres and singlemode fibres consequently we have 1000BASE-SX and 1000BASE-LX.

The form factors used in transporting Gigabit Ethernet and Fibre Channel is the so called Gbic interface the 2000s. This hot-swappable module become obsolete after the rise of the smaller form of the transceiver: the SFP -small Form Factor Transceiver.

1 and 2.5 Gbit/s SFP

1 Gbit/s for copper twisted pair cabling, 8P8C (RJ-45) connector 1000BASE-T - these modules incorporate significant interface circuitry and can only be used for gigabit Ethernet, as that is the interface they implement. They are not compatible with (or rather: do not have equivalents for) Fiber channel or SONET. Unlike 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. These are relatively uncommon and can be easily confused with 1 Gbit/s SFPs.

Fiber Interfaces: