布线发展史

如何测试 SFP 收发器与网络线缆

Recently we have been getting questions about how to determine if an SFP (Small Form-factor Pluggable) transceiver is working. We refer to SFP generically here to represent a multitude of the various optical modules that are available. Fluke Networks fiber testers can be used to measure the light that is being put out by an SFP.

2022 年 1 月 21 日

为今天的光纤检测选择最佳的光纤范围

Contaminated connections remain the number one cause of fiber related problems and failures in data centers, campus, and other enterprise or telecom networking environments. But it’s not enough to just clean every fiber end face—there is no way to know if the end face is clean unless you inspect it.

 

2022 年 1 月 4 日

位于边缘的光纤与铜:为什么智能的生态建筑越来越多地选择光纤

For years, we’ve heard about FTTX making its way into the horizontal LAN—fiber to the desktop, fiber to the office, fiber to the enclosure, fiber to the zone, etc. Often referred to as “fiber to the edge” or FTTE, most of these deployments have traditionally been for high-security government environments or specialty applications or devices. Now, as bandwidth requirements continue to increase and the commercial real estate industry is trending towards smarter and more sustainable buildings, the question of using fiber vs. copper is more relevant.

2021 年 12 月 8 日

What You Need to Know to Choose a PoE Tester

2021 年 12 月 1 日

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

虽然根据所使用的组件类型,有许多不同类型的光纤连接器,但LC连接器已广泛应用于整个网络行业。

塑料LC连接器

塑料连接器用于插入后很少反复插拔的连接时,效果会很好。但是,当需要反复建立和断开连接,例如使用光纤测试参考跳线时,外壳上的柔性锁扣经常会因为反复弯曲而断裂。

塑料 LC 连接器在锁闩处断开

塑料LC连接器上损坏的锁扣示例

 

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

如何使用网络电缆测试仪 - LinkIQ™

2021 年 6 月 22 日