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ケーブリング・クロニクル

2017-3-01

 

最近話題の PoE(パワー・オーバー・イーサネット)向けの LP 認証ケーブルを耳にし、自社の PoE 環境にこのケーブルが必要化どうか知りたいと思っていませんか?この新しい UL 認証規格、2017 National Electric Code(米国電気工事規程)との関係、策定された理由、そしてテストしなければならない理由について詳しく見ていきましょう。

代替案

2017-2-23

You may have heard that propagation delay and delay skew parameters are important for IPTV, surveillance and video conferencing, and many vendors may tout delay skew performance for these video applications.

But do you know why these parameters are important for video applications?As part of our Cable Testing 101 series, we thought you might want to know more.

2017-2-15

Wolfenstein 3D のゲームが大人気だった頃、当社は BICSI カンファレンスで Cat 5 リンクにノイズを引き起こすことで障害を発生させる試みを行いました。私たちは、蛍光灯安定器、大きな電動機、エンジンのかかった車の点火コイルの近くにケーブルを配置するなど、さまざまなやってはいけないことを試しましたが、それでもリンクはエラーフリー同然の 100BASE-TX パフォーマンスを提供しました。当時、ほとんどのケーブル敷設環境では、遮蔽付きのケーブルの利点はそれほどないように思われていました。

2017-2-08

 

The 2017 BICSI Winter Conference wrapped up last week in Tampa where thousands of ICT professional from around the world had a chance to gain valuable industry knowledge and check out the latest products from nearly 180 vendors in the exhibit hall – including our new DSX-8000 CableAnalyzer.

2017-2-02

On January 23, we announced the DSX-8000 CableAnalyzer™, the first true Category 8 tester. You may be wondering what is required for a “true” Category 8 certification tester and why we launched it now.

2017-1-25

A wire map test may seem like the most basic test for copper network cabling and therefore one of the least important, but it is actually one of the most critical.And while the pair colors of blue, orange, green and brown might help you pass wire map testing, the test itself really doesn’t care about color at all.

詳しく見ていきましょう。

2017-1-18

 

So you came across some Category 6 cable available online for practically half what you've been paying for that brand name.It claims TIA-568-C compliance, includes the UL listing mark and even has a ETL verification legend printed right on the cable.Before you get too excited, you might want to make sure that cable isn't made with copper clad aluminum (CCA).

2017-1-04

 

All over the news and social media, 2016 has gotten a pretty bum rap.

With everything from shootings, terrorist attacks and the weirdest presidential election in history, to exploding cell phones, scary clown threats and numerous celebrity deaths, 2016 has been denoted as the worst year ever.

2016-12-30

The only way to get correct values when performing Tier 2 testing of duplex fiber links with an OTDR is via bidirectional testing that averages the measurements taken from both ends of the link.

Bidirectional testing used to involve testing the fiber from one end, walking the OTDR to the other end to test again and then averaging the two values to get the results—and it had to be done for each link.

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