Knowledge

Suffixes such as SX, LX, and ZX are distance codes in optical module naming, but they are not unified standards. This article gives a typical distance comparison of common codes, reminding that different manufacturers' suffixes may have different meanings, and you should check the wavelength and actual kilometers before placing an order.

The three wavelength windows of 850, 1310 and 1550 correspond to different optical fibers and distances. This article explains the physical reasons and applicable scenarios of each wavelength, and explains why choosing the wrong wavelength can lead to link failure or insufficient distance.

It is also called an optical module, and its packaging speed and usage vary greatly. This article explains the speed, channel number and slot compatibility of the four packages of SFP, SFP+, QSFP+ and QSFP28. It will help you understand the specifications before you get the model and then decide which port to plug it into.

Most acceptance issues are hidden in the mess at the bottom of the cabinet. This article provides the organization specifications for hierarchical cabling, Velcro bundling spacing, label orientation, and protection of high-risk sections in the transceiver rack to help the computer room achieve less mis-plugging, less over-bending, and easy inspection.

The common stumbling block in the acceptance of cabling projects is not that the link is not working, but that the data is incomplete. This article compiles the five types of necessary information for completion acceptance, the dual-window insertion loss test and loss budget determination methods, and the recording requirements for closed-loop rectification.

Comprehensive cabling standards require link identification to be traceable. This paper gives a set of three-part coding template and labeling process points, covering both ends of the jumper, ODF port and rack slot, and illustrates the consistent landing method for the label, as-built drawing, and port table.

The link where the main fiber optic cable is most prone to accidents is traction and reservation: the core is severely damaged by force, and the reservation is insufficient for hundreds of meters of rework. This article compiles the common experience values of traction, traction speed and reserved length at all levels, and lists the construction taboo actions.

Bending is the most common hidden damage in wiring. In this paper, the empirical values of the minimum bending radius of the jumper, tail fiber, and backbone fiber optic cables under static and construction conditions are given, the mechanism of macro bending loss is explained, and the practical methods for on-site troubleshooting of excessive bending are provided.

How to choose single-mode or multi-mode in the wiring project is a common problem. Starting from the three variables of transmission distance, rate evolution and budget, this paper gives the selection boundaries and mixing taboos of OS2, OM3 and OM4 in the backbone, computer room and horizontal link.

The attenuation of a link does not come only from the optical fiber itself, and the fusion joint, the end face of the movable connector, and the construction bend are often the real big heads. This paper gives the typical loss value and troubleshooting order of each link to help O&M quickly locate the problem.