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Fiber Optic Transceivers The Role

Aifon Technology Co.,Ltd | Updated: Jun 19, 2017

Fiber optic transceivers are generally divided into two types, Fiber Optic Transceivers one is the short distance twisted pair electrical signals and long distance optical signals interchangeable Ethernet transmission media conversion unit, commonly known as photoelectric converter; the other is The optical signal into electrical signals, and then converted to another optical signal, also known as fiber conversion repeater. Fiber Optic Transceivers The product is generally used in the actual network environment where the Ethernet cable can not be covered and must be used to extend the transmission distance, and is usually located in the access layer application of the broadband metro network; while helping to connect the last mile of the fiber to the metro Network and more outside the network also played a huge role.

Because we often use the network cable (twisted pair) the maximum transmission distance has great limitations, the general twisted pair of the maximum transmission distance of 100 meters. Therefore, when we are in the layout of a larger network, had to use relay equipment. Of course, you can also use other types of lines to transmit, such as fiber is a good choice. Fiber transmission distance is very far, in general, Fiber Optic Transceivers single-mode fiber transmission distance of 10 km or more, and multi-mode fiber transmission distance can reach a maximum of 2 km. When using fiber, we will often use fiber optic transceivers. Then the problem came, how to use fiber optic transceivers? How does it access the network?

We all know that a network is composed of a variety of optical devices, fiber optic transceivers is one of the important components. In the fiber optic transceivers access network, the first cable from the outdoor introduction. The cable is to be welded in the cable box, that is, the terminal box. Fiber Optic Transceivers Cable welding is also the door to learn, the need to peel the cable, the fiber in the fiber and pigtail welding, welding and then placed in the box. The pigtail is pulled out, connected to the ODF (a shelf, connected by a coupler), then connected to the jumper by a coupler, and finally the jumper is connected to the fiber optic transceiver. Followed by the order of the order of the router ---- switch --- LAN --- host. In this way, the fiber optic transceivers access the network.

  There are a wide variety of fiber transceivers on the market today, but in general, there are two types of fiber optic transceivers that are used in connection between copper and fiber optic cables and fiber optic transceivers for fiber-optic and cable-to-fiber connections. Fiber Optic Transceivers These two types of fiber optic transceivers can be divided into different sub-categories, the following for each classification are described in detail.

This type of fiber optic transceivers can be connected to Ethernet, Fast Ethernet and 10G Ethernet devices, enabling seamless connectivity between devices with different rates and different port types, typically used for point-to-point transmission Conversion, conversion on campus, and so on. For example, when converting between points and points, two fiber transceivers can be used to connect two UTP (Unshielded Twisted Paired) Ethernet switches, or directly connect the UTP switch to the intelligent terminal.

This type of fiber optic transceivers are mainly T1 / E1 and T3 / E3 two models. These two fiber optic transceivers need to be used in pairs, in extending the cable transmission distance, to avoid noise, improve service quality and network security and so can play a role. T1 / E1 fiber optic transceivers meet T1 (1.544Mbps) and E1 (2.048Mbps) standards, for T1 and E1 connection line installation and maintenance, Fiber Optic Transceivers such fiber optic transceivers can also play a test and troubleshooting role. T3 / E3 fiber transceivers meet T3 (44.736Mbps) and E3 (34.368Mbps) standards, can be used to connect PBX (private branch exchange, dedicated packet switches), multiplexers and routers and other equipment. This type of fiber optic transceivers can be used for signal transmission between buildings and can expand telecom points.

 This type of fiber optic transceivers is a multi-function optical fiber MODEM that supports asynchronous RS-232, RS-485 communication interface, and is connected to remote terminal unit (RTU) to host (HOST) or distributed data acquisition system (SCADA) controller. Good choice. Fiber Optic Transceivers Support RS-232, RS-485 multiple asynchronous communication protocol, you can mix two RS-232, RS-485 interface, support 2-wire (half-duplex) RS-485 work. RS-485 fiber optic transceivers support data (TXD or SD) send control, thereby improving the ability to adapt to various types of software, but also simplifies the control mode, optical fiber MODEM support asynchronous serial port between a variety of fiber connection, Two asynchronous serial port device through the fiber for full-duplex or half-duplex communication, communication distance up to 4 km analog, single mode 20 km,Fiber Optic Transceivers RS-232 signal transmission rate of up to 115.2Kbps, RS- 485 signal transmission rate up to 460Kbps, different electrical standard interface can be used in combination, you can use RS-232 equipment to connect RS-485 equipment, can replace RS-232 to RS-485 interface converter or optical isolator , And provides excellent EMI / RFT (Electromagnetic Interference / Functional Test) features.

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