ケーブリング・クロニクル
光ファイバ・ケーブルとテスターは 400G イーサネットに対応していますか？
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
挿入損失
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
メタル LC コネクター：ファイバー・テスト基準コードでの壊れたラッチに別れを告げる
使用しているコンポーネントの種類に応じて、さまざまなタイプの光コネクタがありますが、LCコネクタはネットワーク業界全体で非常に一般的になっています。
プラスチック LC コネクター
LC コネクターに差し込むだけで、その後はほぼ触れることのない接続部にプラスチックを使用することで、完璧に機能します。しかし、ファイバー・テストの基準コードのように、これらの接続や切断を繰り返し行う必要がある場合、ハウジングのフレキシブルなラッチが繰り返しの屈曲によって壊れることがよくあります。
2021 年 8 月 23 日
PoE負荷試験: PoEシステムの高度なトラブルシューティング
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
データセンターでのクロス接続と相互接続
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
ケーブルとファイバーネットワークテスターのクリーニング方法
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
パッチコードとファイバージャンプケーブルのテスト法 - 最も脆弱な部分
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
LinkIQによるVLANのトラブルシューティング
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
