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Except products belongs to Bargain Shop section, all products are warranted by SOPTO only to purchasers for resale or for use in business or original equipment manufacturer, against defects in workmanship or materials under normal use (consumables, normal tear and wear excluded) for one year after date of purchase from SOPTO, unless otherwise stated...

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Defective products will be accepted for exchange, at our discretion, within 14 days from receipt. Buyer might be requested to return the defective products to SOPTO for verification or authorized service location, as SOPTO designated, shipping costs prepaid. .....

Applications

An Ethernet to Fiber Media Converter can also be used where there is high level of electromagnetic interference or EMI which is a common phenomenon found in industrial plants. This interference can cause corruption of data over copper-based ethernet links. Data transmitted over fiber optic cable however is completely immune to this type of noise. An Ethernet to Fiber Optic Converter therefore enables you to inter-connect your copper-ethernet devices over fiber ensuring optimal data transmission across the plant floor.

Optical fiber media converter work

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How Gigabit Ethernet Works-Data Transmission

 

 

On 10Base-T standard each bit that the computer wants to transmit is physically coded into a single transmitting bit, i.e., for a group of eight bits being transmitted, eight signals will be generated on the wire. Its’ 10 Mbps transfer speed means that its’ clock is of 10 MHz, but just because each clock cycle a single bit is transmitted. On other standards this is different.

 

100Base-T uses a coding scheme called 8B/10B, where each group of eight bits is coded into a 10-bit signal. So, differently from 10Base-T, each bit does not directly represent a signal on the wire. If you make the proper math, with a 100 Mbps data transfer rate, the clock rate of 100Base-T is of 125 MHz (10/8 x 100).

 

So, Cat 5 cables are certified to have a transmission speed of up to 125 MHz. What Gigabit Ethernet does is to change the coding. Instead of making each bit to be coded into a single signal like 10Base-T or to code each 8-bit group into a 10-bit signal, it codes two bits per signal. So, a signal over a Gigabit Ethernet cable represents two bits, instead of a single bit. In order words, instead of just using two voltages on a signal representing merely ”0“ or ”1“, it uses four different voltages, representing ”00“, ”01“, ”10“ and ”11“.

 

10/100M Fast Media Converter

10/100M Fast Media Converter

 

Also, instead of using just four wires of the cable, Gigabit Ethernet uses all wires. On top of this, all pairs are used in a bi-directional fashion. As we’ve seen above, both 10Base-T and 100Base-T uses different pairs for transmission and reception; on 1000Base-T, as Gigabit Ethernet cabling is also called, the same pairs are used for both data transmission and reception.

 

The beauty of Gigabit Ethernet is that it still uses the 100Base-T/Cat 5 clock rate of 125 MHz rate, but since more data is transmitted per time, the transfer rate is higher. The math is quite simple: 125 MHz x 2 bits per signal (i.e., per wire pair) x 4 signals per time = 1.000 Mbps. This modulation technique is called 4D-PAM5 and it actually uses five voltages (the fifth voltage is used for its error-correction mechanism).

 

So it is a mistake to say that Gigabit Ethernet runs at 1.000 MHz. It doesn’t. It runs at 125 MHz just like Fast Ethernet (100Base-T), but it achieves a 1.000 Mbps because it transmits two bits per time and uses the four pairs of the cable. In the table below you can check Gigabit Ethernet cabling pinout. “BI” stands for bi-directional, while DA, DB, DC and DD stand for “Data A”, “Data B”, “Data C” and “Data D”, respectively.

 

Pin

Color

Function

1

White with Green

+BI_DA

2

Green

-BI_DA

3

White with Orange

+BI_DB

4

Blue

+BI_DC

5

White with Blue

-BI_DC

6

Orange

-BI_DB

7

White with Brown

+BI_DD

8

Brown

-BI_DD

 

Sopto supplies high quality fiber media converters, like Gigabit Media Converter, PSE Media Converter and so on. For the newest quotes, please contact a Sopto representative by calling 86-755-36946668, or by sending an email to info@sopto.com. For more info, please browse our website.