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Crônicas sobre cabeamento

06-9-2018

Teste do diagrama de fios: não é somente a cor

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.

Let’s take a closer look.

What’s It Testing For?

15-8-2018

O caminho para 200 e 400 Gig já está pavimentado (e percorrido)

The increasing demand for higher bandwidth to support Big Data has driven the need for ever-increasing Ethernet speeds, starting with 10 Gig in 2004 to the introduction in 2010 of 40 Gig with 4 fibers transmitting and 4 fibers receiving at 10 Gbps (40GBASE-SR4) and 100 Gig with 10 fibers transmitting and 10 fibers receiving at 10 Gbps (100GBASE-SR10).

02-8-2018

Troubleshooting Installed Cable with DSX-5000 CableAnalyzer

It felt like a Monday morning when the call, actually an e-mail, came in. “I think my DSX is broken!” As you know, they are really tough machines and, when it looks like the Fluke is wrong, usually it isn’t.

“What makes you think it is broken?” I asked, “How does this failure manifest itself?”

“The tester is failing links that used to pass.”

01-8-2018

Por que eu recebo "perda positiva" ao verificar um cabo de teste?

Verification of test reference cords is easy, right? Yes, usually…but not always. After the power meter is set to 0 dB via the reference procedure, the loss of a mated connector pair is expected to be less than 0,20 dB for single-mode (e.g., -0,20 dB). Let’s examine one scenario where a loss is not negative (e.g., +0,15 dB).

The typical process for validating the loss of a connector, to verify if it is “reference grade” for example, is as follows:

25-7-2018

Testes nos espaços do Data Center

Depending in which functional area of the data center you are testing, there are different applications, cabling and connectivity that you will encounter. Understanding the functional areas of the data center and what you will likely need to test in each can help prepare you for data center testing.

What Are the Spaces?

18-7-2018

Aprovado pela ANSI/TIA 568.2-D!

The latest TIA standard for balanced twisted-pair cable systems – TIA 568.2-D – was approved for publication during the TR-42.7 meeting on 12 de junho de 2018. It will replace TIA-568-C.2 and is expected to be published in the coming weeks.

For the past year (or more), we’ve been talking about many of the changes we will see in this standard, and now that it’s approved, we decided a recap is in order.

Letter Swapping

11-7-2018

TIA reconhece conexões MPTL e você também deve

If you are familiar with deployments where a horizontal cable run terminated on one end to an RJ-45 plug connects directly into a device, then you are familiar with what is now referred to as a Modular Plug Terminated Link, or MPTL (even if it wasn’t always referred to in this way).

04-7-2018

Leitura do verão: Top 4 para o 4º

While many of our blog readers are well versed in designing, installing and testing cabling systems, some of you may be new to the industry and still trying to make sense of the various performance parameters, standards and testing requirements that today’s cabling systems must meet to support the latest applications, acquire a vendor’s system warranty and ensure a successful installation for your customers.

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