Functions and differences of fiber optic transceivers? Fiber optic transceivers are Ethernet transmission media conversion units that exchange short-distance twisted pair electrical signals and long-distance optical signals. Converter (Fiber Converter).

Optical fiber transceivers are generally used in actual network environments that cannot be covered by Ethernet cables and must use optical fibers to extend the transmission distance, and are usually located in the access layer applications of broadband metropolitan area networks; such as: high-definition video image transmission for monitoring and security engineering; It also plays a huge role in helping connect the last mile of fiber to the metro and beyond.

The functions and differences of fiber optic transceivers:

1. Optical modems are also called optical MODEMs. There are E1 optical modems, Ethernet optical modems, and V35 optical transceivers. Corresponding service interfaces are configured according to customer needs. E1 optical modems transmit E1 signals through optical fibers, while Ethernet optical modems transmit E1 signals through optical fibers. Optical fiber to transmit 2M Ethernet signal, V35 optical cat is to transmit V35 signal through optical fiber. The optical cat is a device similar to the baseband MODEM (digital modem), and the difference from the baseband MODEM is that the access is an optical fiber dedicated line, which is an optical signal. It is a type of WAN access, which is often referred to as optical fiber access. As long as there is optical fiber, the optical cat needs to convert the optical signal.

2. Optical transceiver is to connect multiple E1s (a data transmission standard for trunk lines, usually at a rate of 2.048Mbps, this standard is adopted in China and Europe, E1 is a physical connection technology, a digital network, which can be coaxial or optical) A device that converts a signal into an optical signal and transmits it (its main function is to realize electrical-optical and optical-electrical conversion). Optical transceivers have different prices according to the number of E1 ports transmitted. Generally, the smallest optical transceiver can transmit 4 E1s, and the current largest optical transceiver can transmit 4032 E1s. Optical transceivers are divided into PDH optical transceivers and SDH optical transceivers. PDH optical transceivers generally refer to optical transceivers below 34M (16E1), while SDH optical transceivers generally refer to optical transceivers above 155M (STM-1). Different optical transceivers are configured according to different needs, and the prices are very different.

3. The simple definition of optical fiber transceiver is to transmit 100M Ethernet or 1000M Ethernet through optical fiber, also known as photoelectric converter, which converts optical signals into electrical signals. Generally, it is used for a long distance in the campus network, and is not suitable for the environment where twisted pair cables are distributed. However, with the development of network technology, the concepts of photoelectric converters and optical cats are becoming more and more blurred. Recently, the two can be basically unified into the same device. Photoelectric converters have also become the scientific name of optical cats. The only thing they can distinguish is the transmission. In the case of Ethernet bandwidth, the optical-to-electrical converter transmits a bandwidth of 100M or 1000M, while the optical cat can only transmit a bandwidth of 2M.

The access methods of optical cats, optical fiber transceivers and optical transceivers are different, and the actual operation conditions are based on on-site requirements.