Structured cabling,Network Cabling, Washinton DC

Structured Cabling’s Six Subsystems – Part 1

22 Aug 2017

cable management,Network Cabling,Washinton DcA structured cabling system is a type of open network structure utilized by data, telephony, access control, building automation, and other systems. Its advantages are operational flexibility and economy. A structured cabling system is typically divided into these six subsystems: 1) Entrance Facilities, 2) Equipment Room, 3) Backbone Cabling, 4) Telecommunications Room, 5) Horizontal Cabling, and 6) Work Area.


Structured cabling is the design and installation of a cabling system that can provide support to several hardware use systems, and be suitable for both the needs of the present and the future.

Governed by international standards regarding the wiring of data centers, offices, and apartment buildings for data or voice communications, structured cabling design and installation utilizes several types of cable. These are typically CAT5e and CAT6, along with fiber optic cabling and modular connectors.

Defining methods and specifications for the laying of cabling in various topologies for meeting customer needs, standards typically require the use of a rack-mounted central patch panel from which modular connections can be used as required. Every outlet is then patched into a network switch for network usage or into a PBX (private branch exchange) or IP telephone system patch panel.

The use of color code patch panel cables is common for identifying the type of connection. However, it is not required by structured cabling standards with the exception of the demarcation wall field.

Cabling standards require that all eight conductors of CAT5e, CAT6, and CAT6A cable are connected to discourage "doubling-up" or the use of one cable for both data and voice. However, IP telephone systems are capable of running both telephone and the computer on the same wire.

When copper cabling, CAT5e, CAT6, or CAT6A is used, the maximum distance is 90 meters (98 yards) for the permanent link installation, along with an allowance of 10 meters (11 yards) for patch cords at the combined ends. Both CAT5e and CAT6 are capable of running Power over Ethernet (PoE) applications up to 90 meters. Due to power dissipation, CAT6A performs better and more efficiently.

Part 2 will summarize each of structured cabling's six subsystems.

Progressive Office Cabling

Founded in 1986, Progressive Office’s success has been a direct result of years of commitment to seeking solutions on behalf of their clients in the Washington, D.C. and New York City areas. Working together, their cabling teams get cabling installed and operating as fast as possible while minimizing disruption and downtime. Call their toll free number (800) 614-4560 today.

Network Cabling,data cabling,,DC

Cabling Issues

11 Apr 2013

data cabling,,DCOne of the most important things about cabling is to purchase cable not just for what you’re using now but for what you may run in the future.   A rule of thumb is to install the highest-grade cable that your budget allows.

The standard is Ethernet. That means there are two basic types of cables to use: copper Ethernet and fiber optic Ethernet. Copper Ethernet cabling is generally used to connect the data center equipment to the end-user, while fiber optic cabling is used to network the infrastructure and to

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Network Cabling, Data Cabling

Windows 7 Was Not My Idea

23 Aug 2010

Network Cabling,Data cablingSo, I bought a new Acer Aspire One Netbook for my wife and for home use. It is a terrific little machine. It comes with Windows 7, 1gb RAM, a 160gb hard drive, 3 USB ports, external video jack, 10" LCD screen, 100mb ethernet, WiFi, cam and a microphone for only $325. And it weighs just over 2 pounds.

But when I went to install my printer to the machine I ran into a problem. I have a HP LaserJet 1320TN at home. It has been a terrific printer. It has 2 trays and it prints on both sides of a page. It has never had a single problem. I think the printer is about 7 or 8 years old. So, I get out the CD that came with the printer and I copy it onto a thumb drive because the netbook does not have a CD drive. Then I try to install it but it just doesn't work. The printer software is too old.

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IT support, computer repair

Bad Power Supply

4 Oct 2008

bad power supplyHow do you know when you have a bad power supply? Well, the symptoms are fairly basic. I had a client call me last week. He said his computer would not turn on. So, I asked him to tell me if anything came up on the monitor. He said, "No, the monitor is blank". So, I asked if he could see any lights come on the CPU and he told me that the CPU's LEDs were also dark. So, I asked him to put his ear to the power supply and tell me if he could hear the fan turning. He said it seemed quiet.

So, as a final test, I asked him to carefully look at the power supply and to tell me if the fan is spinning. He said it was not. Therefore, the power supply was bad. The next trick was in looking up the exact make and model and finding a generic replacement that would fit into the system. We did and we were able to get his computer back up and working the same day.

Call Progressive Office if you need IT Support at 202-462-4290.

Data Cabling,cables

Dell GX270 Motherboards have Leaky and Broken Capacitors

8 Feb 2008

"There is a known problem with capacitors on the GX270 motherboard bulging and corroding... (Actually, this is a problem on a lot of systems... the GX270 and a few others have a more specific problem where the capacitors were overfilled)."

This came to my attention a couple of weeks ago when a client called with a PC that wouldn't boot. "It won't power on at all" she said.

The technician I sent quickly determined that the problem was the Motherboard, but why did it fail?

However we have discovered that the Nichon capacitors were not all produced outside control specifications. Rather the affected capacitors were limited to certain batches made during specific shifts during the manufacturing process. This means that not all GX270 motherboards are affected. Unfortunately, there is not specific way to determine which motherboards are affected and which are not.

Specifically the capacitors were filled with more liquid than required. After an approximate service life of 300 days and when the CPU reaches a core temperature of 64 degrees C they will begin to bulge and eventually overflow onto the motherboard causing a system crash and a "No Post" failure on boot. There is usually no data loss associated with this issue."

A quick call to Dell resolved the issue in no time at all. After I gave the person on the phone the service tag number and a description of the problem, he informed me that the Motherboard was still under an extended warranty (that ended Jan.31 2008) and they would send a replacement.

23hrs later, the board is at our office door! WOW! That was quick! Thanks Dell! I can't say that we've needed much from their tech support, but they certainly impressed us this time around.

This post was written on February 8, 2008 but more recently Dell has admitted to shipping out millions of computers with faulty capacitors on them. Even worse, they replaced many motherboards with more defective motherboards.  If you have an Optiplex GX270, I would call Dell immediately to see if it is an affected unit.