Optical fiber transceivers, also known as photoelectric converters, are Ethernet transmission media conversion units that exchange short-distance twisted-pair electrical signals and long-distance optical signals.
Different viewing angles make people have different understandings of fiber optic transceivers:
For example, according to the transmission rate, it is divided into single 10M, 100M fiber optic transceivers, 10/100M adaptive fiber optic transceivers and 1000M fiber optic transceivers;
According to the working mode, it is divided into optical fiber transceivers working at the physical layer and optical fiber transceivers working at the data link layer;
From a structural point of view, it can be divided into desktop (independent) fiber optic transceivers and rack-mounted fiber optic transceivers;
According to the different access fibers, there are two types of multi-mode optical fiber transceivers and single-mode optical fiber transceivers.
In addition, there are single-fiber fiber optic transceivers and dual-fiber fiber optic transceiver systems, built-in power fiber optic transceivers and external power supply fiber optic transceivers, as well as managed and unmanaged fiber optic transceivers.
Optical fiber transceivers break the 100-meter limitation of Ethernet cables in data transmission. Relying on high-performance switching chips and large-capacity caches, while truly achieving non-blocking transmission and switching performance, they also provide balanced traffic, isolation and conflict. Error detection and other functions ensure high security and stability during data transmission.
In essence, the optical fiber transceiver only completes the data conversion between different media, and can realize the connection between two switches or computers within 0-120Km, but the practical application has more expansion.
1. Realize the interconnection between switches.
2. The optical fiber transceiver realizes the interconnection between the switch and the computer.
3. Realize the interconnection between computers.
4. Transmission relay: When the actual transmission distance exceeds the nominal transmission distance of the optical fiber transceiver, especially when the actual transmission distance exceeds 120Km, if the site conditions permit, use 2 optical fiber transceivers for back-to-back relay or use Optical-to-optical converters for relaying are a very cost-effective solution.
5. Single-multi-mode conversion: When a single-multi-mode fiber connection is required between networks, a single-multi-mode converter can be used for connection, which solves the problem of single-multi-mode fiber conversion.
6. Wavelength division multiplexing transmission: When the long-distance optical cable resources are insufficient, in order to improve the utilization rate of the optical cable and reduce the cost, the transceiver and the wavelength division multiplexer can be used together, so that the two channels of information can be transmitted on the same pair of optical fibers.
We know that there are many different classifications of fiber optic transceivers, but in actual use, most of the attention is paid to the categories distinguished by different fiber optic connectors: SC connector fiber optic transceivers and ST connector fiber optic transceivers.
When using fiber optic transceivers to connect different devices, you must pay attention to the different ports used.
1. The connection of the optical fiber transceiver to the 100BASE-TX equipment (switch, hub): confirm that the length of the twisted pair does not exceed 100 meters.
Connect one end of the twisted pair to the RJ-45 port (Uplink port) of the optical transceiver, and the other end to the RJ-45 port (common port) of the 100BASE-TX device (switch, hub).
2. The connection of the optical fiber transceiver to the 100BASE-TX device (network card): Confirm that the length of the twisted pair of the optical fiber transceiver does not exceed 100 meters.
Connect one end of the twisted pair to the RJ-45 port (100BASE-TX port) of the optical transceiver, and the other end to the RJ-45 port of the network card.
3. The connection of the optical fiber transceiver to 100BASE-FX: Make sure that the length of the optical fiber does not exceed the distance that the device can provide; one end of the optical fiber is connected to the SC/ST connector of the optical fiber transceiver, and the other end is connected to the SC/ST connector of the 100BASE-FX device.