In the import and export trade by means of letter of credit settlement accounts for the majority of international trade settlement. So what exactly is a letter of credit? To do what? How to use it? Letter OF CREDIT (L/C) is a guarantee in favor OF the seller made by the issuing bank at the instructi

With the increasing demand for product quality and safety, SDS test report has gradually become an important product quality test standard. SDS stands for"Safety Data Sheet" and is usually translated as"Safety Data Sheet". However, many people are confused about whether SDS is a certificate or a rep

Once the LABA Festival passed, the Spring Festival came one after another. It's been an extraordinary year, which makes the upcoming reunion all the more precious and exciting.Chinese New Year is the most ritualistic moment in the hearts of the Chinese people, and it is also a massive national pilgr

1 PrefaceFiber optic cable line lightning and strong electricity, is through the avoidance, channeling or leakage into the ground and other means, in order to prevent lightning/strong electricity on the fiber optic cable line itself or communication equipment and people made damage. Since the lightn

1 IntroductionBefore 1980s, preserved wood poles (hereinafter referred to as "wood poles") were mostly used in communication lines. At that time, wooden poles were often called tarred poles because the preservation of wooden poles was treated with tar at post offices or long-distance service station

1 unequal score optical adaptation scenario analysisTraditional unequal score optical ODN introduction of fiber optic lines usually use a tree network structure, each splitter box is equivalent to the "leaves", generally assigned 2 cores (a master and a standby), the structure can be adapted to a va

The quality of the home network is mainly related to the performance of the home network devices, the connection between the devices, the quality of the wifi signal in the residence, and the use of the user.1 Performance of equipmentThe performance of the equipment that has a big impact on the wifi

The impact of broadband fiber access networks on the quality of home broadband services is often related to ODN fiber link interruptions, ONU weak light, GPON access to Gigabit subscribers, OLT uplink bandwidth limitations, and OLT reloading.1 ODN fiber link interruptionFrom the viewpoint of the cau

1. Increase the switchThe longest transmission distance of category 5 and category 6 network cable is 100 meters, if you want to increase the transmission distance, you can install relay equipment such as switches between the two twisted-pair cables, theoretically up to 4 switches can be installed.

1 IntroductionIn ODN, from the service aggregation point to the user is generally divided into backbone, distribution, introduction, home multiple segments. The construction of the introduction section of the traditional ODN cable involves a large number of fiber core splices. In the user installati