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, Fiber-optic cable,New York City

Introduction to Network Cabling – Part 2

19 Jun 2017

data Cabling,Fiber optic , installationsAs mentioned in Part 1, cabling utilized for network infrastructure is a crucial aspect of networking, growing in importance as new technologies are introduced. Although wireless technology has made great advancements, existing computer networks are still using cables for transferring data. Part 2 will cover Fiber Optics, USB Cables, and Crossover Cables.

Fiber Optics

In contrast to older wiring, fiber optic network cables utilize strands of glass and pulses of light to carry data. Although composed of glass, these cables can be bent and have proven their utility in wide area network (WAN) installations in office buildings, especially when long distance runs are necessary and a high volume of communication traffic is typical.

The two main fiber optic cable standards are single mode, the 100BaseBX standard, and multimode, the 100BaseSX standard. Due to single mode's higher bandwidth capacity, it is typically used by long distance telecommunications networks. On the other hand, local networks commonly utilize multimode because of its lower cost.

USB Cables

USB (Universal Serial Bus) cables, which feature twisted pair wiring, are typically used to connect a peripheral device, such as a mouse, to a computer. Dongles or special network adapters also permit the indirect connection of an Ethernet cable to a USB port.

Serial & Parallel Cables

As numerous PCs during the 1980s and early 1990s did not have Ethernet capability, along with the fact USB did not yet exist, now obsolete serial and parallel interfaces were occasionally utilized for networking PCs together. As an example, null modem cables connected the serial ports of two PCs, allowing 0.115 to 0.45 Mbps data transfer.

Crossover Cables

A null modem cable belongs in the category of crossover cables because it joins two network devices of the identical type, like two network switches or two PCs. Ethernet crossover cable usage was most commonly found in home networks years ago when two PCs were directly connected. Currently the majority of home networks are equipped with routers featuring crossover capability, making crossover cables unnecessary.

Union Network Cabling

When union work requires a unionized cabling group, call on Union Network Cabling for your commercial Cat5e/6/6a and fiber cabling projects. Specializing in cabling for data, voice, security and even the latest WiFi and LiFi solutions. Phone: (202) 462-4290

Data Cabling,Network Cabling, Washington DC

Introduction to Network Cabling – Part 1

12 Jun 2017

 Data Cabling,Network Cabling, Washington DCCabling utilized for network infrastructure is a crucial aspect of networking, and it has grown in importance as new technologies are introduced, including virtualization, wireless access points, blade servers, network storage devices, etc.

Although wireless technology has greatly advanced, most of the existing computer networks are still using cables as the media for transferring data. Each standardized type of network cable is utilized for a specific purpose as discussed below.

Coaxial Cables

Patented in 1880 (yes, that long ago!), coaxial cable is most familiar as the cable that connects TV sets to their antennas and also as the standard for 10 Mbps Ethernet, which was common in the 1980s and early 1990s. During this time, networks utilized two coaxial cable types, thicknet, the 10BASE5 standard, or thinnet, the 10BASE2 standard. Composed of an inner copper wire surrounded by insulation and shielding, the stiff quality of these cables made them difficult to install and maintain.

Twisted Pair Cables

During the 1970s, Ethernet was developed at Xerox, which began collaborating with Intel and DEC for its standardization. The initial specifications, titled the Ethernet Blue Book or DIX from their three company initials, was published in 1980.

In the 1990s, twisted pair cables became the primary cabling standard of Ethernet, beginning at 10 Mbps with Category 3 or Cat3, which was followed by 100 Mbps Cat5 and Cat5e and up to 10 Gbps (10GBASE-T). Ranging up to eight wires wound together in pairs, this type of cabling is intended to minimize electromagnetic interference.

Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP) are the two chief twisted pair cable types standardized by the industry. Due to lower manufacturing costs, modern Ethernet cables utilize UTP wiring. STP cabling is used by other types of networks like Fiber Distributed Data Interface (FDDI). Clearly the most common network cable type globally, UTP cable is utilized for both networking and for the traditional telephone (UTP-CAT1) cabling.

UTP-CAT5e or Cat5e has become the most common UTP cable as it replaced coaxial cable, which was unable to cope with the increasing demand for networks that were faster and more reliable.

Part 2 will cover Fiber Optics, USB Cables, and Crossover Cables.

Union Network Cabling

When  your work requires a unionized cabling group, call on  Progressive Office Inc. for your commercial Cat5e/6/6a and fiber cabling projects. Specializing in cabling for data, voice, security and even the latest WiFi and LiFi solutions. Phone: (202) 462-4290

IT Support,Data Cabling,Atlanta GA

The Organizations that Set Cabling Standards

27 May 2017

Data Cabling,Network Cabling,Atlanta GAThe TIA (Telecommunications Industry Association) and the ISO (International Organization for Standardization) are the primary organizations that oversee the development of structured cabling standards for the industry. Committees formed by the IEEE (Institute of Electrical and Electronics Engineers) provide assistance through testing and setting performance specifications for various standards.

Compliance with standards ensures the functioning of systems at specified levels, backward compatibility, and a greater selection of equipment will exist. General global recognition of standards permit utilizing equipment sourced from various countries inside computer systems. Requirements for the components of optical and copper cabling including cables, assemblies, connectors, cabling spacing and pathways, administration, field testing, and installation are standardized to make worldwide acceptance possible.

Technicians in North America typically use TIA standards, while the rest of the world uses ISO standards. Examples of organizations that set regional and national standards organizations are CENELEC (European Committee for Electrotechnical Standardization), CSA (Canadian Standards Association) and JSA (Japanese Standards Association). Their standards are generally compatible with TIA and ISO.

Different terminology used by TIA and ISO Associations sometimes cause confusion because they refer to the same item. For example, what the TIA terms as Cat5e is what ISO terms to be Class D. However, adherence to standards set by TIA and ISO ensure system cabling requirements are properly implemented in the categories below.

  • Insertion Loss – Decrease of signal strength down the transmission line.

  • Return Loss – Measurement of signal reflections on the cable.

  • NEXT – Near End Crosstalk Loss due to signal coupling.

  • Propagation Delay / Delay Skew – Elapsed time for signal to reach other end of cable or the delay between signal arrival at far end on slowest and fastest cable pairs.

  • ACR – Difference between insertion loss and NEXT.

  • ELFEXT – Identical to NEXT, but for cabling system’s far end.

  • PSANEXT / PSAACRF – Power sum alien crosstalk at near end / Power sum alien crosstalk at far end.

Due to ever-increasing data rates, the efforts of the standards organizations are assuming greater importance in terms of ensuring proper system design.

Union Network Cabling

When your work requires a unionized cabling group, call on  Progressive Office Inc. for your commercial Cat5e/6/6a and fiber cabling projects. Specializing in cabling for data, voice, security and even the latest WiFi and LiFi solutions. Phone: (202) 462-4290

cable,Data Cabling ,Cat5e, Cat6/6a Cabling

Category 5e Cabling Becoming Obsolete

4 Apr 2017

cable,Data Cabling ,Cat5e, Cat6/6a CablingIt is inevitable that applications requiring speeds greater than 100 Mbps and 1000 Mbps will increase. The growing use of wireless devices, high resolution images, HD video streaming, surveillance, and multimedia are straining the capacity of Category 5e infrastructure, and there will come a point when it will be unable to cope.

Although it is capable of handling 1000 Mbps speeds at 100 MHz, the upgrading of Category 5e cabling will be necessary in the near future in order to support new applications and emerging technologies that will be deployed by businesses that are bandwidth intensive.

Category 5e Inadequate in Near Future

Cabling will be migrating from being behind walls to above ceilings, where it can end at a wireless access point (WAP). Much more cabling will be needed to serve an increasing utilization of WAPs for numerous users.

The advent and growth of new Wave 2 WiFi devices, which transmit at data at ranges of 1 Gbps up to perhaps 7 Gbps, will require faster Ethernet links for the connection of these WAPs. Installing Category 6A cabling may be the only effective solution for companies. The need for average speeds greater than 1G is increasing, perhaps to 10G. Category 5e is incapable of carrying speeds of 10 Gbps speeds over a required distance of 100 meters.

An emerging technology using balanced twisted-pair cabling, HDBaseT is used to transmit uncompressed HD video, audio, Ethernet, control, and power over 100 meters. Category 5e will be unable to support it, while Category 6A cabling is capable.

4-cable pair PoE, the next power over Ethernet standard, provides power more efficiently. However, the gauge of cable must grow in order for the reduction of resistance and permit higher power delivery. Consequently, 4-pair PoE has superior performance on Category 6A 23 AWG than Category 5e 24 AWG.

Cabling Standards Recommend Category 6A

For certain organizations, such as educational institutions, commercial buildings, data centers, and healthcare facilities, new installations require or recommend at least Category 6 cabling. Even though Category 6A may require greater capital expenditure than Category 5e cabling, costs will be decreased in the long term. A company’s network will be future proofed and will be capable of supporting new applications and emerging technologies.

Union Network Cabling

When union work requires a unionized cabling group, call on Union Network Cabling for your commercial Cat5e/6/6a and fiber cabling projects. Specializing in cabling for data, voice, security and even the latest WiFi and LiFi solutions. Phone: (202) 462-4290

CAT 6a,network cabling, DC

Gradual Phase Out of CAT5e Cabling in Office Buildings

13 Mar 2017

Class E (CAT6), Network Cabling, DCAfter their Milan working group meeting in 2015 regarding cabling standards, the International Organisation for Standardisation (ISO) and International Electrotechnical Commission (IEC), together known as the ISO/IEC, made the announcement that Category 5e (CAT5e) cabling will be considered obsolete for new installations in commercial and industrial buildings.

Setting the first international standard for cabling more than 20 years ago, ISO/IEC continually works on the development, maintenance, and promotion of technology and communications technical standards. A major change for the cabling of office buildings is now being implemented worldwide, raising the minimum horizontal cabling requirement from Class D (CAT5e) to Class E (CAT6), along with recommendations for installing Class EA (CAT6a) or faster cabling. Essentially, this will result in making CAT6 the minimum requirement for installations in new office building installations.

Providing a maximum performance of 100 MHz over computer networks, CAT5e has been utilized in structured cabling for both Ethernet and IP communications.  Considered adequate for fast Ethernet and gigabit Ethernet, CAT5e has the additional capability of carry video and telephony signals. The original ISO/IEC 11801 standard now has cabling classes that were added for enabling the support of up to 10 gigabits a second, such as CAT6, CAT6A, CAT7 and CAT7A.

CAT5 is not capable of matching the speed of data that CAT6 or CAT7 cabling can deliver. CAT6 has a maximum performance of 250 MHz, while CAT7 has a maximum performance of 600 MHz, enabling ultra-fast Ethernet. In addition, CAT7 features better durability and a longer service life than either CAT5 or CAT6 cabling.

More than 20 years have passed since ISO/IEC 11801 made its debut as an international standard, and it has led the way for the reliable implementation of data and voice cabling globally. However, CAT5e is now in the process of being phased out. Superior classes of cabling are being installed at new office buildings. Wireless LAN infrastructure is upgrading at a rapid pace, along with its speed, to keep up with the growing number of smartphones, laptops, and tablets. These demands have forced the gradual replacement of CAT5e with newer cabling that will meet current and future user expectations for fast and efficient data capability.

Union Network Cabling

When union work requires a unionized cabling group, contact Union Network Cabling for your commercial Cat5e/6/6a and fiber cabling projects. They specialize and excel in cabling for data, voice, security, and even the latest WiFi and LiFi solutions. Phone: (202) 462-4290