布线发展史

Are your fiber optic cables and testers ready for 400G Ethernet?

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).

2021 年 8 月 25 日

The Metal LC Connector: say goodbye to broken latches on fiber test reference cords

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。

Plastic LC connector Broken at the Latch

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

光纤极性基础知识

极性决定了流动方向,例如磁场或电流的方向。在光纤中,极性是有方向的;光信号从光纤电缆一端传输到另一端。线缆一端的光纤链路发送信号(Tx)必须与另一端的接收器(Rx)相匹配。那么,什么是光纤极性?光纤极性可以定义为光信号从光纤线缆的一端传递到另一端的方向。

这一点似乎显而易见,很容易理解,但光纤极性却似乎是技术人员最容易产生混淆的一个领域。因此,让小福给大家细细从头说起。

2021 年 6 月 24 日

如何使用网络电缆测试仪 - LinkIQ™

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

所有ICT业内人士都听说过局域网(LAN),而且可能知道局域网是一个由无数设备组成的网络——计算机、服务器、Wi-Fi接入点、VoIP电话,监控摄像头等等。所有这些设备都连接在同一个物理位置。

由于从技术层面上讲,虚拟局域网(VLAN)在物理角度上并不存在,其本质表现为物理上独立的局域网,并基于功能实现流量隔离,尤其对于只习惯于处理物理基础设施的安装人员和技术人员来说,更令人困惑。

今天小福带你深入了解一下,为什么要使用VLAN,以及其对电缆设备的故障诊断和排除有何影响。

2021 年 5 月 26 日