Cabling Technology-Optical Fiber fusion loss and threading Techniques

Wiring skills-how to reduce the loss of Optical Fiber splices

Definition: a certain amount of loss occurs when the light is transmitted to the connector after the optical fiber connection is established.

Cause: the optical fiber fusion loss is mainly composed of the transmission loss of the optical fiber and the fusion loss at the optical fiber fusion joint. Because the quality of Optical Fiber Connection affects the transmission loss of optical fiber lines, optical fiber lines do not have relay amplification transmission distance and other parameters, it is necessary to minimize the loss of Optical Fiber splices, to ensure the transmission quality of the optical fiber CATV signal.

How can we reduce the loss of Optical Fiber splices? The method is as follows:

1. Try to use the same batch of high-quality bare fiber brands on one line

2. Optical Cable erection as required

3. Select experienced and well-trained Optical Fiber Connection personnel for connection

4. Connecting optical cables should be carried out in a clean environment

5. optical fiber end face cutter with high precision is used to prepare the optical fiber end face.

6. correct use of the melting Machine

Wiring skills-cabling skills

In the cabling project, the construction level directly affects the system performance, and serious problems need to be re-reworked, such as wrong slot, reversed color labels on the distribution frame, and wrong numbers, wire threading technology, such as cables passing through steel pipes and transition boxes, is a commonly used technology. We will summarize the mature experience in this area for your reference.

Threading Technology is a common technology in cabling. To ensure that cables are not scratched, resulting in a "Short Circuit", plastic ports must be placed in all steel pipes. One feasible method is that the threading personnel should carry the "port guard" at any time during construction, and can be placed at any time when necessary, so as to avoid being "lazy" because there is no "Port guard" at hand ". When the vertical cable is transferred to the vertical steel pipe next layer through the transition box, it should be bundled and suspended in the Transition box to avoid the full weight of the cable on the middle side of the bend, because this will affect the transmission characteristics of the cable. Cables in the vertical cable trough should be bundled and hung once per meter. The cables in the cable trough should be straight and winding, And the length should be consistent.

For the problem of "residual cable", the length of the "remaining cable" in the distribution box must be the same, and the length should not be too long. It is best to group the remaining lines by grouping table, pull and tie them straight from the outlet of the cable trough, and the distance between the binding points is not greater than 50 cm. It should be noted that wire or hard power cord cannot be bound.

The cables are labeled according to the computer plan. Each number corresponds to a 4-core cable, and the location of the corresponding room and outlet cannot be wrong. This is the most prone to errors during implementation. Experience is that the labels at both ends are 25 cm away from the end and pasted with light-colored plastic tape. The labels are written or pasted with paper labels with a pen and then wrapped with transparent tape.

In addition, the standby line is usually worn at a rate of 3%. The standby line is placed in the trunk channel, with at least one backup line on each layer. After cabling is completed, all 4-Core Cables should be fully disconnected. The following method can be used in the test to strip all the cores of the two ends of the cable to expose the copper core. At one end, the digital multimeter is switched to the disconnected test file, and the two table pens are connected to a pair of cable cores. At the other end, the pair of cable cores are frequently and temporarily exposed. If you can hear intermittent sound at the table end, it means the test is successful, and the four cores of each cable are tested. Through such tests, we can find problems such as disconnection, broken circuit, and Mark errors.

During the cabling period, it should be noted that when the cable is not deployed in place after it is pulled out of the cable box, if the construction is to be suspended, the cable should be carefully wrapped and put together for safekeeping. This is often overlooked by many non-standardized cabling construction teams.