Archives for February 2014

Information Technology Tip Thursday – Raspberry Pi and how to get started

The Raspberry Pi has been a real cool micro computer and I’m sure you’ve seen many different applications that it can be used for. Here’s a great read on what you need to know before you get started with your Raspberry Pi.

Rasberry

MTP Fiber Optic Cable – Polarity

TIA-568-C.0 “Generic Telecommunications Cabling for Customer Premises” goes over three MTP cable polarity methods – A, B and C. With multiple channels in a connector, components must be manufactured with the same polarity. Differences in polarity will not be corrected by simply flipping or switching the positioning of the connector at the location. Here’s a quick look at the current polarity methods.

I’m going to start you out with what so far seems to be the most popular polarity pinout, this would be the “Universal Polarity Management Method” and is used in many Corning fiber networks. It seems to be a little odd that this would be the most popular so far because the universal method is not included in the TIA standard but it does meets the “intent of the standard” that’s according to Corning. Makes good sense that this would be most popular because Corning seems the be the biggest giant in the fiber optic cable market.

This system is mated key-up to key-down. This method supports simple concatenation of multiple trunks without effecting polarity. Accommodates all simplex/duplex connector types. The components related to your MTP connector will also allow for easy moves without polarity concerns used in other methods.

universal

The next most common polarity pinout method I see is “Method B”. This uses a single module type wired in a straight-through configuration and standard patch cords on each end. One thing that will stand out to you is how all the components in the system are key-up to key-up. This method will require more planning for your modules location. This method also does not accommodate angle polished single mode connectors. It’s also a common method in Commscope fiber optic network infrastructures and popular with end users due to it simplifying upgrades.

method b

Now thinking about it, the next method is not far behind after looking at my sales history of MTP cables. Let’s talk about “Method A”. This uses a single type wired in a “Straight-Through” configuration and two different patch cords in a optical circuit. One cord is straight and the other is flipped. All components in the channel are mated key-up to key-down. Because the polarity is addressed in the patch cords the end user is responsible for managing the network.

method A

The last method I’m going to brush on is “Method C”. This uses a pair wise fiber flip in the trunk cable to correct for polarity. This will enable the use of the same module on both ends of the channel and standard patch cables. Because the polarity is managed in the trunk, extending links requires more planning to maintain polarity. The TIA standard does not mention text regarding the ability to migrate to parallel optics, but parallel optics capability can easily be achieved with a special patch cord to reverse the pair-wise fiber flips in the trunk.

method c

So, there are four popular wiring schemes but the standard only recognizes three. I know, it feels like a bit of a gray area. Further questions contact sales at 888-797-3697 or comment below. Thanks!

 

Information Technology Tip Thursday – Colossus 70th anniversary

It was the 70th anniversary of the Colossus computer, it was first used to try and crack messages sent by Hitler to his generals on February 5th 1944. This is a great podcast by the BBC, worth the listen, I promise.

Share if you care, thanks!

Save time and labor with Telescoping Strut Replacement

We just got our hands on a new part by CADDY called a Telescoping Strut Replacement, it’s an innovative alternative to using strut-based trapeze or support structures to support cable tray baskets, cable conduit or pipe. Eliminate the need for for handling long lengths of strut and cutting sections of strut to size.

cutting-unistrut

This new bracket telescopes to the desired length, attaches to threaded rod with a captive threaded nut on each end, and is locked into place by tightening a screw on a pre-installed steel band.

Telescoping

Let’s check out some of the features of this new product.

  • Ready to use out of the box and eliminates the need for cutting sections of strut
  • Captive threading nuts enable fastening to threaded rod supports without loose parts
  • Clearance holes help quickly create multi-level trapeze
  • Supports up to four 2″ conduits or four 2″ water filled pipes at 10′ spacing
  • Works with KBT wire basket tray clip for securing wire basket cable tray
  • Works with SCH Single-Piece strut clamps

Let’s now get a better look at this item from our YouTube Channel (Don’t forget to subscribe to the channel for weekly videos)

Now that you’re going to have some extra time on your hands you need to grab some kind of tool, maybe a hammer and just walk around with it. You don’t want the boss thinking your doing nothing so make it look like your doing something.

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