cable, installation, cabling, Washington D.C.

Ethernet Crossover Cable Basics

24 Jan 2018

cable, installation, cabling, Washington D.C.The crossover cable connects two Ethernet network devices to each other. They were invented for temporarily supporting host-to-host networking when a network router or another intermediary device is not available. Although crossover cables appear the same as a standard straight-through (patch) Ethernet cable, their internal wiring structures are different.



Straight Through vs. Crossover


A straight-through cable is used for connecting two different kinds of devices, such as a network switch to a computer. In contrast, a crossover cable is for connecting two devices that are identical.


The straight-through cable’s ends can be wired in any manner, but both ends must be identical. This is different from the crossover cable’s internal wiring, which reverses the signals for receiving and transmitting. The first and third wires and the second and sixth wires are crossed.


High-quality Ethernet crossover cables have special markings which allow users to distinguish them from straight-through cables. They are often red in color and the word "crossover" will appear on its casing and packaging.



Crossover Cable Needs


Crossover cables came into use during the 1990s and 2000s because the most common types of Ethernet were unable to support direct cable connections between hosts. Intended for using specific wires for both receiving and transmitting signals, the original and Fast Ethernet standards required the communication of two endpoints through an intermediary device to avoid conflicts.


The Ethernet feature MDI-X has auto-detection for the prevention of signal conflicts, enabling the Ethernet interface to automatically determine and negotiate the expected signaling convention of the device at the other end of the cable. The majority of home broadband routers and Gigabit Ethernet adopted MDI-X.


As a result, crossover cables are only necessary for the connection of two Ethernet client devices if they are not configured for Gigabit Ethernet. Nowadays, Ethernet devices are compatible with crossover cables because they can automatically detect them.



Ethernet Crossover Cables Usage


Crossover cable usage should be limited to direct network connections. When a user tries connecting a computer to an antiquated router or network switch via a crossover cable rather than a standard cable, the link can be prevented from working.



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 our clients in the Washington, D.C. and New York City areas. Efficiently working together, Progressive Office teams get cabling installed and operating as fast as possible while minimizing disruption and downtime. Call our toll free number (800) 614-4560 today.

Structured cabling, data cabling, network cabling

Advantages of Upgrading to Structured Cabling – Part 1

4 Jan 2018

Structured cabling, data cabling, network cablingIf it has been a while since your company has upgraded your network cabling, you and your team may not be achieving your potential. As you know, an organization’s IT network is the very heart of its operations. Lacking a network that is up-to-date, staff members will not be as efficient and productive as possible.



Updating from Point-to-Point Cabling


The update that yields the most benefits is having your network make the transition from an outdated point-to-point cabling system to a far more effective structured cabling system. As you may know, there are only two ways for transmitting data over network cables. Numerous companies persist on using point-to-point cabling. Unfortunately, it tends to become problematic, especially when a company needs to significantly expand the network’s size and capabilities. Let’s dig deeper to understand the reasons.


Point-to-point cabling directly connects a switch, device, network, a server, or network, to another network component via fiber optic cable. For the last few decades, this wiring method provided an innovative way to swiftly build a network. However, during that period, the majority of networks at IT departments were not large.


Nowadays, as networks expand and speedy transmissions of massive data amounts become routinely expected, the maintenance of outdated point-to-point cabling systems, along with the thousands of cables required for operations, becomes a large burden on a company’s IT resources.


As a result, organizations have transitioned to structured cabling systems. Rather than directly connecting every single network component to another, a structured cabling system directly links storage units and servers to a communication backbone.


Installed in every part of a facility, local cabling panels are linked to the communication backbone with only one cable. This enables users to easily connect their devices to the whole network by connecting a cable to the nearest cabling panel.


Part 2 will discuss the advantages of upgrading to Structured Cabling.



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 our clients in the Washington, D.C. and New York City areas. Efficiently working together, Progressive Office teams get cabling installed and operating as fast as possible while minimizing disruption and downtime. Call our toll free number (800) 614-4560 today.

Technology,Network Cabling, cables

Fiber Optic Cabling for Your Business – Part 1

8 Oct 2017

Technology,Network Cabling, cablesThe widespread use of fiber optic cabling stems from 1950s research. These studies eventually made transmitting visible images via glass filament possible. This new technology was eventually used for viewing instruments and remote illumination for surgery. Subsequently, George Hockham and Charles Kao successfully achieved data transmission through glass fiber in 1966.


Fiber optic cabling is composed of glass fiber filaments housed within insulated casing, and these cables were designed for long distance, large capacity, and high performance data networking and telecommunications. In comparison to wired cables, fiber optic has high-bandwidth capability and is capable of data transmission over longer distances. Due to these properties, fiber optic cabling is used for a great portion of telephone, internet, and cable television systems around the world.



Fiber Optic Advantages


Fiber cables provide a number of advantages that make them superior to copper cabling. Due to properties of high bandwidth and low-loss, fiber optic cabling can be utilized over much greater distances than copper cables. Fiber optic cables can run up to 2 kilometers for data networks without repeaters. This is because light can travel much further on fiber cable and still retain its strength.


Fiber optic cables have greater capacity. Through the use of multiplexers, a single fiber optic cable can have the same network bandwidth as several hundred copper cables. It is now standard for fiber cables to be rated at 10 Gbps, 40 Gbps, and 100 Gbps.


Although it has special shielding as protection against electromagnetic interference, copper network cable is still susceptible when numerous cables are close to each other. This is in contrast to the physical properties of the glass used in fiber optic cables.


Fiber optic is also safer to use than copper in volatile spaces, where sparks can lead to disaster. It also has the upper hand in terms of security because tapping fiber cable to steal data transmission is very difficult.


Part 2 will discuss how fiber optic functions, its two main types, and fiber networks.



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 our clients in the Washington, D.C. and New York City areas. Efficiently working together, Progressive teams get cabling installed and operating as fast as possible while minimizing disruption and downtime. Call our 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

structured cable management

Cable Basket Trays – Uses and Benefits

25 Jun 2015

Cable basket trays are described as go-to solutions for routing and supporting numerous cable runs. The wired frame Structured cabling, Data Cabling, DC enhances air circulation and cable ventilation. This can be appropriate beneath desks, elevated floors, or hanging tray systems. You can assemble basket trays for intersections, horizontal sections, mounting braces, hardware, and tray cutters.


The cable basket tray made of welded steel wires is considered the most popular support for copper and data cabling. The basket is light-weight and easy to install with complete array of cable tray accessories. Solid basket trays are recommended for heavier wires. These baskets are fabricated to withstand natural elements. Although the material is not solid steel, it is capable of protecting cables from corrosion and last longer.




Cable Distribution and Management


The cable basket makes possible efficient dispersal and management of cables. This process is accomplished by arranging cables inside the basket trays instead of pulling them through pipe lines. The act of yanking is certainly harder and time-consuming rather than using baskets. Laying down wires in the basket take only minimal time and ensures that cables are distributed evenly around the structure.



The baskets can be stretched along the building just like pipes. However, baskets are open facilitating easier access to the cables. At the same time, it provides sufficient protection to the network cabling system. Cable baskets are lighter with easier functions compared to trays which are quite bulky. Technicians can finish more installations in one day because of fast installation.




Installation Guidelines


Incidentally, it is important to make sure that cable trays should be installed as an inclusive system. The tray should be complete with all the supports mechanisms, fasteners, guards, connections, flexible vertical and horizontal spice plates. You have to mount cable trays so the joints will be accessible for inspection and modification. Support systems are needed so the distance does not go beyond the required measurements. Install intermediary support devices in case the weight of the cable is more than tray rungs’ load capacity.


Erect supports from channel members, twisted rods and other accessories provided by the cable tray manufacturer. Organize the supports in bar or wall-bracket models as called for by the application. Make sure to take away sharp border s from cable trays. You can attach the tray to the spice pates but use square neck-carriage bolts and self-locking nuts. The cable tray should support the building structure. Finally, mount the cable trays with sufficient space to allow access for the installation of network cables.


 
Network cabling, NetworkTopologies.

Essential Facts About Cabling System

14 Dec 2014

Network cabling, NetworkTopologies.Your office cabling system is costly and complicated investment. It's also a commitment to an office design and structure that is not easy to modify. If you add more workstations later, new cabling might be needed.


Most offices have a structured cabling topology that hardwires the cables from wallplate to patch panel. With this system, modifications are less likely because the initial installaiont includes a planning process that should anticipate some expansion. By pre-wiring potential locations in an existing or newly-constructed building, future moves, additions or alterations are avoided. You can just transfer patched cables in the wiring closet. Also, it is critical to number the wallplates to match the corresponding patch panel number. This will make it much easier to relocate a workstation or to troubleshoot a connectivity problem.



There are several sub-systems to consider:



  • The Demark refers to the point where the Internet Service Provider's (ISP) data line comes to an end and hooks up with the cabling in the building.

  • The equipment room serves as storage for all apparatus and wiring integration points.

  • Backbone cabling are high-speed cables (typically Cat6 or fiber) that connect various floors or wall closets.

  • The horizontal cabling for links up the network space to individual wallplates. These are done through conduits and ceiling spaces on every level.

  • The telecommunications enclosures are wall or floor mounted cages that hold the network equipment; primarily the patch panels ands switches but also sometimes the server and Uninterruptible Power Supplies (UPS) too.


Installation and design of structured cabling is regulated by standards that identify the following:



  • Network data switches

  • Offices layout for voice & data communications for Cat5e or Cat6 cable

  • Fiber Optic cables for backbones

  • Modular connectors at the wallplate


These components will guide the layout of cables in order to fulfill the data access requirements of your office. All of the cables start at the patch panel on a mounted rack (about 19 inches wide) in the wall closet. From there, they traverse through the drop ceiling and down the walls to individual wallplates. Quite often a wallplate will host 2 or more connections. At the wallplate a short patch cable, usually 7 to 14 feet in length wil connect the computer, phone, printer or other networked device.


All cabling standards require that all of the eight conductors in Cat5, Cat5e and Cat6 cables are inter-connected in a precise color-coded pattern. The network cable connects each device but some devices can share a single cable. This is true for VoIP phones. Most VoIP phones have a jack for the network cable and then a jack on the phone for connecting the computer. This pass-thru enables the two devices to share one connection.

Network cabling, cables,shielding

About Ethernet Cables and Data Shielding

7 Dec 2014

Network cabling, cables,shieldingThe Ethernet network cable connects devices on a LAN (local area network) such as personal computers, switches and routers. These cables are typically Cat5 and Cat6. These cables provide the infrastructure that connects the PCs, printers, router/modem and other peripherals to a switch. The cables are made up of stranded or solid copper wires. Stranded wires are not as susceptible to fractures but are more difficult to terminate. Solid Cat5/Cat6 also is less susceptible to electrical interference. These shielded cables are made up of braided strands of copper wrapped in a polymer layer and spiral copper tape. The shield is applied across the splices.


An Ethernet cable can be compared to an electrical power cord in that it can only extend a limited distances because of the electrical transmission properties. Meanwhile, wireless technologies (Bluetooth and Wi-Fi or local wireless technology) have enhanced the reach of Ethernet in residential and enterprise networks. The standard Ethernet cable consists of four coiled pairs that terminate at the eight pins of the clipped connector or "RJ45" at both ends of  a cable. At the wallplate is simply the female end of the same connector. The cable is made up of unshielded (UTP) or shielded twisted-pair (STP) cabling.


Shielding is not selected automatically during installations. The answer is, it affords the protection required for certain environments although there are also some downsides. One is mass. The single-shielded cable made of Ethernet weighs approximately 12 percent more than the unshielded cable. The double-shielded version is roughly 30 percent heavier. You may be putting together dozens or perhaps hundreds of individual shielded twisted-pair cables along  a  ladders tray above the ceiling, under a floor, or at the back of panels. The aggregate weight of these cables can collapse the mounting bracket.


Cable flexibility is also an important issue. Take care when you pull the cables through  conduits. The cable shielding can make installation more difficult. The sole foil shield can crack while the sharp boundaries of the shield can scrape the insulation of individual wires. This can cut the wire and cause data transmission issues.



What are the shielding options?


You have a number of shielding choices in for your Ethernet network. The single-shielded cable has the lightest protection. Double-shielded cables contain a foil and plate shield. It can ensure better protection against electromagnetic or radio frequency interference and reduce issues related to cable relocation. High-flex industrial cables are fabricated and protected for uninterrupted applications. These have special jacket materials to address industrial and outdoor concerns.

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

CAT5E/CAT6 Cable Repair & Patching Techniques

15 Aug 2014

Network Cabling,Crimp Tool , Data CablingNetwork cables are said to be the “arteries and veins” of the communications network. The cabled system is a highly consistent platform for setting up infrastructure since the connectivity is very reliable. It is also easy to troubleshoot. However, it is not really fail-safe. Cables can get warped and sometimes snagged in ceilings. The connectors can also get broken if they are pulled to hard at the wallplate.


It does not matter whether it is Cat5e or Cat6. Cat6 is considered a better choice although, for some, cost prohibitive. When you look at it,

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Network Cabling Data Cabling

Distinguishing between Cat5 and Cat6 Network Cables

12 Jun 2014

Network cablesCAT 5,Network Cabling Data Cabling connect and transmit information between personal computers, storage area networks and routers. You can now find various models of cables. Your choice may depend on configuration and topology of the system’s architecture. The most common variety is known as twisted pair cable in local area networks. Numerous Ethernet networks use this type of cable. It is composed of four pairs of fine wires or conductors. Each pair is entwined several times to prevent obstruction from other cables and devices.


The CAT5 or Category5 is an example of twisted pair cable

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