We often see the demand for long-distance data transmission in building intelligent projects, basically using optical fiber transmission. The link between these requires optical modules and fiber optic transceivers to achieve. Many users have some doubts about the use of optical modules and fiber optic transceivers. How to connect them? What are the precautions?
Optical Module and Optical Transceiver
Let's first understand the difference between the two:
1. The optical module is a functional module, or an accessory. It is a passive device that cannot be used alone. It can only be used in switches and devices with optical module slots; while the optical fiber transceiver is a functional device and is a separate active device. The equipment can be used alone with the power supply;
2. The optical module itself can simplify the network and reduce failure points, while the use of optical fiber transceivers will increase a lot of equipment, greatly increasing the failure rate and occupying too much storage space in the cabinet, which is not beautiful;
3. The optical module supports hot swap, and the configuration is relatively flexible; the optical fiber transceiver is relatively fixed, and it will be more troublesome to replace and upgrade than the optical module;
4. The optical module is more expensive than the optical fiber transceiver, but it is relatively stable and not easy to be damaged; while the optical fiber transceiver is economical and practical, but it must consider many factors such as the power adapter, optical fiber status, and network cable status, and the transmission loss accounts for about 30%. ;
5. Optical modules are mainly used for optical interfaces of optical network communication equipment such as aggregation switches, core routers, DSLAMs, OLTs, etc., such as: backbone networks of optical fiber networks such as computer video, data communication, and wireless voice communication; optical fiber transceiver applications In the actual network environment where Ethernet cables cannot be covered and optical fiber must be used to extend the transmission distance, it is usually located in the access layer application of broadband metropolitan area network, such as: high-definition video image transmission for monitoring security engineering and the last mile line of optical fiber Connect to the metropolitan area network and the outer network;
In addition, some points should be paid attention to when connecting the fiber optic module and the fiber optic transceiver: the wavelength and the transmission distance must be the same, for example, the wavelength is 1310nm or 850nm at the same time, and the transmission distance is 10km; the fiber jumper or pigtail must be connected with the same interface. Generally, the optical fiber transceiver uses the SC port, and the optical module uses the LC port. This point will prompt the choice of interface type when purchasing. At the same time, the speed of the optical fiber transceiver and the optical module must be the same. For example, the Gigabit transceiver corresponds to a 1.25G optical module, 100M to 100M, and Gigabit to Gigabit; the fiber types of the optical modules must be the same, single fiber to single fiber, Dual fiber to dual fiber.
