Fibre Optic Network Products Perfomance

Transceivers: The Small Form-Factor Pluggable (SFP) is a compact optical transceiver used in optical communication for both telecommunication and data communication applications. It interfaces a network device mother board (for a switch, router or similar device) to a fibre optic or unshielded twisted pair networking cable. It is a popular industry format supported by several fiber optic component vendors.

SFP transceivers are available with a variety of different transmitter and receiver types, allowing users to select the appropriate transceiver for each link to provide the required optical reach over the available optical fiber type (e.g. multimode fibre or single mode fibre). Optical SFP modules are commonly available in four different categories: 850 nm, 1310nm, 1550nm, and DWDM, SFP transceivers are also available with a "copper" cable interface, allowing a host device designed primarily for optical fiber communications to also communicate over unshielded twisted pair networking cable.

1000BASE-SX GBIC: A GBIC is a standard for transceivers, commonly used with Gigabit ethernet and fibre Channel. The name is an acronym for "gigabit interface converter". By offering a standard, hot swappable electrical interface, one gigabit ethernet port can support the full range of physical media, from copper to 100 km single mode optical fibre.

1000BASE-SX is a fibre optuc Gigabit Ethernet standard. It operates over multi-mode fiber using a 850nmr, near infrared (NIR) light wavelength. The specification allows for a maximum distance between endpoints of 220 m over 62.5/125 µm fibre although in practice, with good quality fibre and terminations, 1000BASE-SX will usually work over significantly longer distances. Modern 50/125 µm fibres can reliably extend the signal to 500 m or more. This standard is highly popular for intra-building links in large office buildings, colocation facilities and carrier neutral internet exchanges.

1000BASE-LX is a fiber optic Gigabit Ethernet standard, using a long wavelength laser (See IEEE 802.3 Clause 38). Signaling speed 1.25±100 ppm GBd, wavelength 1270 to 1355 nm, RMS spectral width (max) 4 nm. Typically, GbE lasers will be specified as having a 1300 or 1310 nm wavelength.

1000BASE-LX is specified to work over a distance of up to 2 km over 9 µm single-mode fiber. In practice it will often operate correctly over a much greater distance. Many manufacturers will guarantee operation up to 10 or 20 km, provided that their equipment is used at both ends of the link. 1000BASE-LX can also run over multi-mode fiber with a maximum segment length of 550 m. For any link distance greater than 300 m, the use of a special launch conditioning patchcord may be required. This launches the laser at a precise offset from the center of the fiber which causes it to spread across the diameter of the fiber core. This reduces the effect known as differential mode delay which occurs when the laser couples onto only a small number of available modes in multi-mode fiber

1000BASE-T (also known as IEEE 802.3ab) is a standard for Gigabit Ethernet over copper wiring. It requires, at a minimum, Category 5 cable (the same as 100BASE-TX), but Category 5e ("Category 5 enhanced") and Category 6 Cables may also be used and is often recommended. 1000BASE-T requires all four pairs to be present and is far less tolerant of poorly installed wiring than 100BASE-TX.

Each network segment can have a maximum distance of 100 meters, although several chip manufacturers claim 150 meters.

In computer networking, Fast Ethernet is a collective term for a number of Ethernet standards that carry traffic at the nominal rate of 100 Mbit/s, against the original Ethernet speed of 10 Mbit/s.

Introduced in 1995, Fast Ethernet is no longer the fastest form of Ethernet: Gigabit Ethernet and the new 10 gigabut Ethernet standards are 10 and 100 times faster, respectively.

100BASE-TX

100BASE-TX is the predominant form of Fast Ethernet, providing 100 Mbit/s Ethernet.

10-gigabit Ethernet or 10GbE is the most recent as of 2005 and fastest of the Ethernet standards. It defines a version of Ethernet with a nominal data rate of 10 Gbits's, ten times faster than gigabit Ethernet 10GbE over fiber and is specified by the IEEE 802.3-2005 standard. 10GbE over twisted pair is forthcoming under the IEEE 802.3 as an amendment.

Fibre Channel is a gigabit-speed network technology primarily used for Storage Networking. Fibre Channel is standardized in the T11 Technical Committee of the InterNational Committee for Information Technology Standards (INCITS), an American National Standard Institute–accredited standards committee. It started for use primarily in the supercomputer field, but has become the standard connection type for Storage Area Networks SAN's in enterprise storage. Despite its name, Fibre Channel signaling can run on both twisted pair copper wire and fibre optic cables.

Fibre Channel Protocol (FCP) is the interface protocol of SCSI on the Fibre Channel.

The XFP (10 Gigabit Small Form Factor Pluggable) is a hot-swappable, protocol independent optical transceiver, typically operating at 1310nm or 1550nm, for 10 Gigabit SONET/SDH, Fibre Channel, Gigabit Ethernet and other applications. It includes digital diagnostics similar to SFF-8472 but more extensive, that provide a robust management tool.

The Multi Source Agrrement (MSA) standard is not yet finalised. It aims to provide a common specification for systems manufacturers, system integrators and suppliers of XFP modules

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