Industrial SFP optical module 1.25G single mode dual fiber 20KM

Note: Due to the continuous upgrading of switches, routers and other products, there may be compatibility issues between fiber optic modules and some switches. In order that the optical module you purchased can be compatible with the switch and used normally, please contact customer service before purchasing and explain the brand and model of switch the module you purchased is used on. (or leave a message to explain).

SFP OPTICAL MODULE TROUBLESHOOTING：

1. Confirm whether the optical fiber jumper matches the optical fiber module. The common colors of multi-mode fiber jumpers are orange, gray, and turquoise. Such fiber jumpers have the words 62.5/125U and 50/125U printed on them. Single-mode optical fiber patch cords usually come in yellow, blue, etc., with words such as 652D, 9/125U etc. printed on the line. Optical fiber modules are mostly represented by black pull rings as multi-mode (850NM wavelength), and other colors are represented as single-mode optical modules.

2. Closed inspection. The single-mode optical module uses invisible light. We can use a jumper to connect the transmitting port and receiving port of the optical module, which is called self-loop. If the working status light of the switch is on, it means it is working normally.