SFP (Small form-factor plug-gable transceiver)
Gigabit Ethernet (GE) came into use in 1999 and has been gradually supplanting Fast Ethernet (FE) in wired local networks, due to the fact of being considerably faster. The transmission hardware used for connecting GE supported devices retains the compact Small Form-factor Pluggable (SFP) package. SFP is often called mini-GBIC (Gigabit Interface Converter). Because it is smaller size and has replaced GBIC modules in most 1Gb applications. The initial Gigabit Ethernet hardware standard was produced even one year earlier than its use. It is IEEE802.3z (1000BASE-X), which required optical fiber. Other Gigabit Ethernet standard SFP transceivers or non-standard but industry accepted Gigabit SFP transceivers were introduced successively in the past years.
Varieties of Gigabit SFP Transceivers
SFP transceiver can be categorized into different versions under Gigabit Ethernet standards and industry-accepted standards, including
1000BASE-T, 1000BASE-TX, 1000BASE-SX, 1000BAS-LX, 1000BASE-LX10, 1000BASE-BX10, 1000BASE-LX/LH, 1000BASE-EX, and 1000BASE-ZX.SFP Transceivers Over Copper Cabling: 1000BASE-T vs. 1000BASE-TX1000BASE-T (IEEE 802.3ab) transceiver is 1Gb copper SFP that transmits GE over twisted pairs. They make GE a desktop technology since users can use their existing copper cabling infrastructure. 1000BASE-TX (TIA/EIA-854) is similar copper SFP version but utilizes only two pairs of wires
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