With the popularization and use of optical communicatio […]
With the popularization and use of optical communications in a large area, some optical end devices have gradually become familiar to the public, such as optical modems, optical fiber transceivers, and industrial switches, but some specific functions, performance, and applications are not well understood.
Optical modem is the abbreviation of optical fiber modem, which is a conversion device for the mutual conversion of electrical signals such as 232, 485, 422 and optical signals, and is generally used in pairs. The main function of the equipment is to extend the electrical signal transmission distance of 232, 485, and 422.
The transceiver is also called an optical fiber transceiver, which is a device for mutual conversion of Ethernet electrical signals and Ethernet optical signals. The main function of its equipment is to extend the transmission distance of Ethernet electrical signals. It can provide ultra-low delay data transmission and is transparent to the network protocol. A dedicated ASIC chip is used to realize data line-speed forwarding. The programmable ASIC combines multiple functions on one chip. It has the advantages of simple design, high reliability, and low power consumption, which can make the equipment obtain higher performance and lower cost. .
Industrial switches are a kind of Ethernet connection equipment for data exchange in the network. Industrial switches are also called industrial Ethernet switches. They are used in the field of industrial control. Due to the use of network standards, good openness, wide application The main communication equipment in the field of industrial control. Industrial switches have carrier-class performance characteristics and can withstand harsh working environments. Rich product series and flexible port configuration can meet the needs of various industrial fields. Industrial switches include managed industrial switches and unmanaged industrial switches.
The scope of application of the three: Optical modems are used for the transmission of control signals, generally used for power control, ship locks, access control, electricity meters, real-time data collection, etc.; transceivers are generally used for monitoring, data communication, network video, network audio Transmission: Industrial switches are generally used in power, wind power, mines, tunnels, rail transit, large financial systems, and thermal power plants to form a network group.
The three networking methods: both optical modems and optical fiber transceivers are point-to-point transmission; industrial switches can be networked in point-to-point, star, tree, and ring structures.
The working level of the three: optical modems and transceivers both work at the physical layer; industrial switches work at the data link layer.