SFP Media Converter is a Fiber to Ethernet Media Converter
with Fast Ethernet ports, dual-rate Fast/Gigabit Ethernet ports, or
Gigabit Ethernet ports. The ports allow for flexible network
configurations using SFP transceivers. And the Fast Ethernet SFP Media
Converter uses Fast Ethernet SFPs.
According
to the types of Fast Ethernet SFPs, there are corresponding kinds of
Fast Ethernet SFP Media Converters. We should know the Fast Ethernet
standards to understand this device.
Fast Ethernet is a collective
term for a number of Ethernet standards that carry traffic at the
nominal rate of 100Mbps, against the original Ethernet speed of 10Mbps.
There are several Fast Ethernet standards including 100Base-T,
100Base-TX, 100Base-FX, 100Base-SX, 100Base-BX, etc.. Obviously, the
"100" means 100Mbps rate.
100Base-T is an initial Fast Ethernet
standard for twisted pair cables. The segment length for a 100Base-T
cable is limited to 100m. 100Base-TX is the predominant form of Fast
Ethernet, and runs over two wire-pairs inside a CAT5 or above cable.
Since a typical CAT5 cable contains 4 pairs, it can support two
100Base-TX links with a wiring adaptor. Of the Fast Ethernet standards,
100Base-TX is by far the most widespread and is supported by the vast
majority of Ethernet hardware currently produced.
100Base-FX is a
version of Fast Ethernet over optical fiber. It uses a 1300nm NIR light
wavelength transmitted via two strands of optical fiber, one for
receive(RX) and the other for transmit(TX). 100Base-FX should use SC,
ST, LC, MTRJ or MIC connectors with SC being the preferred option.
However, it is not compatible with 10Base-FL, the 10Mbps version over
optical fiber. A 100Base-FX SFP operates on ordinary MMF (multimode
fiber) link spans up to 2km.
100Base-SX is another version of Fast
Ethernet over optical fiber. It uses two strands of multimode optical
fiber for RX and TX. It is a lower cost alternative to using 100Base-FX,
because it uses short wavelength optics which are significantly less
expensive than the long wavelength optics used in 100Base-FX. 100Base-SX
can operate at distances up to 550m. It uses the same wavelength as
10Base-FL. Unlike 100Base-FX, this allows 100Base-SX to be backwards
compatible with 10Base-FL. Because of the shorter wavelength used
(850nm) and the shorter distance it can support, 100Base-SX uses less
expensive optical components (LEDs instead of lasers) which make it an
attractive option for those upgrading from 10Base-FL and those who do
not require long distances.
100Base-BX is a version of Fast
Ethernet over a single strand of optical fiber, while 100Base-FX uses a
pair of fibers. Single-mode fiber is used along with a special
multiplexer which splits the signal into TX and RX wavelengths. The two
wavelengths used for TX and RX are 1310/1550nm. The terminals on each
side of the fiber are not equal, as the one transmitting downstream uses
the 1550nm wavelength, and the one transmitting upstream uses the
1310nm wavelength. Its transfer distances can be 10, 20 or 40 km. A
100Base-BX SFP operates on ordinary SMF (single mode fiber)
single-strand link spans up to 10km.
Contraposing to these
different standards, Fast Ethernet SFP Media Converters are designed
with different SFP ports to support the 100Base-T SFP, 100Base-FX SFP,
100Base-SX SFP, 100Base-BX SFP and even 100Base-FX to 100Base-TX SFP transceiver which is used in the converter with two SFP ports (100Base-FX and 100Base-TX).
FiberYes
supplies not only 100Base SFP Media Converters for Fast Ethernet, but
also 1000Base SFP Media Converters for Gigabit Ethernet. These SFP Media
Converters extend copper to fiber, multimode to multimode and multimode
to single mode fiber by working with the SFP module. An extensive range of SFP Media Converters are in stock to meet every fiber conversion need.
Here are some features of FiberYes's Fast Ethernet SFP Media Converters
1. Extend Fast Ethernet network distances up to 120km
2. Support multimode and single mode fiber
3. Support SC, LC and ST fiber connectors
4. Special functions like Link Pass-Through, Far-End Fault, Auto-MDIX and Loopback
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