Features and applications of optical fiber transceiver

The fiber optic transceiver is an Ethernet transmission media conversion unit that exchanges short-distance twisted-pair electrical signals and long-distance optical signals. It is also called a photoelectric converter or optical fiber converter in many places. ).

              Optical fiber transceivers are generally used in actual network environments where Ethernet cables cannot be covered and optical fibers must be used to extend the transmission distance. At the same time, they have also played a huge role in helping to connect the one kilometer line behind the optical fiber to the metropolitan area network and the outer network. The role of.

        With the optical fiber transceiver, it also provides a cheap solution for users who need to upgrade the system from copper wire to optical fiber, but lack capital, manpower or time. In order to ensure full compatibility with network equipment such as network cards, repeaters, hubs and switches from other manufacturers, optical fiber transceiver products must strictly comply with Ethernet such as 10Base-T, 100Base-TX, 100Base-FX, IEEE802.3 and IEEE802.3u Net standard. In addition, it should comply with FCC Part 15 in terms of EMC protection against electromagnetic radiation. Nowadays, major domestic operators are vigorously constructing community networks, campus networks and enterprise networks, so the consumption of optical fiber transceiver products is also increasing to better meet the construction needs of access networks.

        Fiber optic transceivers usually have the following basic characteristics:

        1. Provide ultra-low latency data transmission.

        2. Completely transparent to the network protocol.

        3. A dedicated ASIC chip is used to realize data transmission at line speed. Programmable ASIC concentrates multiple functions on one chip, and has the advantages of simple design, high reliability, and low power consumption, which can enable equipment to obtain higher performance and lower cost.

        4. Rack-type equipment can provide hot-swappable functions for easy maintenance and uninterrupted upgrades.

        5. The network management equipment can provide functions such as network diagnosis, upgrade, status report, abnormal situation report and control, and can provide complete operation log and alarm log.

        6. Most equipment adopts 1+1 power supply design, supports ultra-wide power supply voltage, and realizes power supply protection and automatic switching.

        7. Supports ultra-wide operating temperature range.

        8. Support complete transmission distance (0～120km)

        Optical fiber transceivers use optical fiber, a high-speed propagation medium, to solve Ethernet transmission problems. In some large-scale enterprises, optical fiber is used as the transmission medium to establish a backbone network during network construction, while internal LAN transmission The medium is generally copper wire. How to connect the LAN to the optical fiber backbone network? This requires conversion between different ports, different lines, and different optical fibers and guarantees the link quality.

        The current fiber optic transceiver products are not smart enough. For example, when the optical path of the fiber optic transceiver is broken, the electrical port on the other end of most products will still remain open, so upper-level devices such as routers and switches will still continue to send packets to the electrical port, resulting in unreachable data . It is hoped that the majority of equipment providers can realize automatic switching on the optical fiber transceiver. When the optical path is DOWN, the electrical port will automatically raise an alarm and prevent the upper-level equipment from sending data to the port, and enable redundant links to ensure uninterrupted services.