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Cabling Chronicles

2017-04-26

 You have likely heard copper network cabling referred to as balanced twisted-pair copper cabling, and maybe you’ve heard of the testing parameter referred to as DC resistance unbalance. But what does all this balance-related terminology really mean, and why should you care?

It’s All About Balance

2017-04-19

Guest Posting from Corning Optical Communications

OM5, previously known as wide band multimode fiber or WB MMF, has been quite the hot-button topic as the standards have been widely debated and are now finally concrete.

So what is OM5 exactly? Most simply, it’s a version of the OM4 fiber with additional bandwidth characterization at 953 nm.

2017-04-13

Lately, I have been getting questions about why bend insensitive multimode fiber (BIMMF) can’t be used in test cords. The argument is that non-BIMMF (e.g., “traditional” fiber) is becoming more difficult to procure and installers need the flexibility to buy something off the shelf. Additionally, requests are being made to change one IEC testing standard to not mandate the use of non-BIMMF in test cords. Let’s examine this closer and explore the consequences.

2017-04-05

No, not what Deedee would ask Dexter in his lab, what does that button do on the bottom of the FI-1000 video inspection camera? It turns out it has a really helpful function that I want to share with you here.

2017-03-29

In recent years, passive optical LANs have gained significant popularity as an alternative to horizontal copper structured cabling in a variety of enterprise spaces.

The technology brings fiber out of the riser backbone and data center, and with that comes the need for fiber technicians to test these systems out in the horizontal space.

Let’s take a closer look at these passive optical deployments.

How Do They Work?

2017-03-22

In last week’s blog, we took a Closer Look at 40 Gig Duplex Multimode Applications, just one of the many ways that today’s data centers are cost-effectively achieving increased bandwidth in switch-to-switch fiber links. And when we say many ways, we literally mean many.

2017-03-15

 

There’s been a lot of talk in the industry surrounding solutions capable of running 40 Gig Ethernet over duplex multimode fiber—especially with OM5 wideband multimode fiber (WBMMF) now recognized within industry standards that specifies wavelengths between 840 and 953 nanometers to support wave division multiplexing (WDM).

2017-03-08

With the wide variety of standards relating to fiber optic cabling, the absence of published standards for testing fiber optic cabling terminated with MPO connectors might come as a surprise. Finally, a technical report (TR), written by this author, is scheduled for a June 2017 publication that provides such testing guidance - it is TR/IEC 61282-15. A technical report provides guidance on a subject but does not have requirements (e.g. no “shalls”) as an international standard or an ANSI/TIA standard would.

2017-03-01

 

You maybe have heard the recent buzz about LP-certified cable for power over Ethernet (PoE) applications and be wondering if you need this cable for your PoE installations. Let’s take a closer look at this new UL certification, its relationship to the 2017 National Electric Code, why it was introduced and why you still need to test.

An Optional Alternative

2017-02-23

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.

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