布线发展史
您的光缆和测试仪是否已准备好用于 400G 以太网？
Driven by large hyperscale and cloud data center providers, advancements in signaling and transceiver technology have led to the development of next-generation transmission speeds. There are now multiple options available for 400G Ethernet applications over multimode and single-mode fiber with more on the horizon. And it doesn’t stop there—big players like Google, Facebook, and Microsoft are driving innovation to support 800 Gig and 1.6 Terabit applications, and the IEEE Beyond 400 Gig Ethernet Study Group is already defining objectives.
2021 年 9 月 28 日
插入损耗
What is Insertion Loss?
Insertion loss is the amount of energy that a signal loses as it travels along a cable link. It is a natural phenomenon that occurs for any type of transmission—whether it's electricity or data. This reduction of signal, also called attenuation, is directly related to the length of a cable—the longer the cable, the greater the insertion loss. Insertion loss is also caused by any connection points along a cable link (i.e., connectors and splices).
Insertion Loss Formula
2021 年 8 月 25 日
金属 LC 连接器：告别光纤测试参考线上的损坏闩锁
虽然视您所使用的组件类型而定，有许多不同类型的光学连接器，但 LC 连接器在网络行业已非常常见。
塑料 LC 连接器
使用塑料以插入的方式进行连接，连接后无需再管便可完美运行。但是，当需要反复进行连接和断开这些连接时，例如使用光纤测试参考线，外壳上的柔性闩锁经常由于反复弯曲而断裂。
2021 年 8 月 23 日
PoE 负载测试：先进的 PoE 系统故障排除
Since the original IEEE 802.3af Type 1 power over Ethernet (PoE) standard that delivered up to 15.4 Watts (W) was first introduced in 2003, the technology has evolved to include Type 2 (up to 30 W), Type 3 (up to 60 W), and Type 4 (up to 90 W). That means PoE voltage now supports everything from phones, Wi-Fi access points, and surveillance cameras, to laptops, digital displays, and even facility-wide LED lighting—all requiring various levels of PoE power.
2021 年 7 月 27 日
数据中心的交叉连接和互联
In the data center space, cross connects and interconnects via patch panels are commonly used between active equipment purely for management and flexibility, typically residing between switch tiers or between switches and servers. Some scenarios even call for using multiple cross connects or interconnects within the same channel, or a combination thereof.
2021 年 7 月 14 日
2021 年 6 月 22 日
如何清洁您的电缆和光纤网络测试仪
Cleanliness has long been a best practice in fiber optic installation, but it’s not just the fiber end faces you need to worry about. If you think about how often your cabling tools and testers are touched by you and others on the job site, it’s clear that they too need to be cleaned.
While a fiber end face and your Fluke Network tester are cleaned for two different reasons, the goal in both instances is to clean without causing any damage.
2021 年 6 月 11 日
如何测试跳线和光纤跳线电缆 - 最弱链路
Equipment cords are an integral part of any network—whether it’s a fiber jumper used to make connections between fiber patching areas and switches in the data center or a copper patch cord out in the LAN to connect end devices to the work area outlet.
2021 年 6 月 10 日
通过 LinkIQ 排除 VLAN 故障
Everyone in the ICT industry has heard of a local area network (LAN) and likely understands that it’s a network made up of a myriad of devices—computers, servers, Wi-Fi access points, VoIP phones, surveillance cameras, etc.—all connected in one physical location.
2021 年 5 月 26 日
2021 年 4 月 28 日
