Network cabling,Office Cabling in DC

Upgrading or Adding to Your Network – Progressive Office can Help

12 Jan 2011

Office Cabling in DCThere could be any number of reasons that your voice and data system may be changing.  You might be adding more PCs or phone lines; adding a dedicated server to store critical data or adding scanners or printers to more adequately serve customer needs.


In order to ensure a seamless transition into your larger, upgraded network there’s a very good chance that you’ll need upgrades or

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

Computer Network Patch Panel

23 Dec 2009

Network Cabling ,Data Cabling, Cat5e, Cat6/6a CablingA patch panel is an in-line series of connections mounted onto a frame to enable network cables to be terminated in an orderly manner. Typically, the panel is the termination point of network cabling drops that are installed in a office or residential cabling system.It is numbered and comes in 12-port, 24-port, 48-port and 96-port configurations. The numbering of the panel ports allows for the network installer to label the wallplates to match the corresponding connection at the patch panel.


Patch panels are most commonly used for computer data networks but as Voice Over Internet Protocol (VOIP) phone systems become more common, we are seeing phone systems being terminated into panels. They are wall or rack-mounted. In small offices, a 12 or 24-port patch panel might be wall-mounted to a wooden mounting board. Larger office networks will usually require a rack mounted series of  panels.


The patch panel comes in Cat5, Cat5e and Cat6 types to match the cable being installed. The connections on the panel are RJ45 that are designed to allow for a cable to "punch-downed" into the connector. The connector has 8 punch down points to accommodate the 4-pairs of wires in a Cat5/6 cable.

Cabling Definitions

24 Sep 2009
Backbone wiring is the cabling used to interconnect between telecommunication closets, equipment rooms and buildings.

A 19-inch rack is a standardized frame or enclosure for mounting multiple equipment modules. A frame style, open rack (see image to the right) would have outer posts but no front or side panels.  An enclosed rack has sides and a door for security and usually includes ventilating fans to keep equipment cool. Enclosures are much more expensive than open racks.

Racks have a front panel that is 19 inches wide, including edges or ears that protrude on each side which allow the shelves, switches and patch panels to be fastened to the rack frame with screws.

Rack Unit or U is a unit of measure that describes the height of equipment to be mounted in a computer equipment rack.  One rack unit is 1.75 inches (44.45 mm) high. The size of rack-mounted equipment is described as a number in "U". For example, one rack unit is referred to as "1U", 2 rack units as "2U" and so on. A typical full size rack is 42U, which means it holds just over 6 feet of equipment.

wallplate-cat5

Wall Plates are the metal or plastic covers that house the network connection jack. Wall plates are flush-mounted on office and residential drywal surfaces.

RJ45 Connector is the modular connector that is found at the end of a network cable. It is similar in look functionality to a phone connection cat5cablebut it is larger in size and it has 4-pairs of wires rather than the 2-pairs that are found in a phone line.

Jacks and Inserts are the actual connection at the wallplate. They are often color coded to distinguish the different connections such as voice and data.

Patch Panel is a series of 24, 48 or 96 RJ45 network connectors on a patchPanelcat5-insertpanel. The patch panel is the hub of all incoming workstation network connections.

Patch Cable is a network cable with RJ45 connectors at each end that create the connection from the wallplate to the computer and also from the patch panel to the switch.

Horizontal wiring encompasses all cable from a wallplate network connection to the wiring closet. The outlets, cable, and cross-connects in the closet are all part of the horizontal wiring.

Wiring closet is an enclosed area, such as a room or cabinet, for containing network, telecommunications equipment, and cable terminations. Each building must have at least one wiring closet.patch cable

Equipment room is the space that houses the office network and telecommunications systems such as PBXs, racks, servers, and the mechanical terminations of the cabling system. Larger facilities often have Equipment Rooms rather than Wiring Closets.

Cabling administration is a process that includes all aspects of premise wiring related to documenting and managing the system, testing the system, as well as the architectural plans for the system.



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cat6-cabling,data cabling,

Cat6 Cabling – Usage and Methods

24 Sep 2009


Category6


cat6-cablingCategory 6 cable, commonly referred to as Cat6, is a cable standard for Gigabit Ethernet and other network protocols that is backward compatible with the Category 5/5e standards. Cat6 features more stringent specifications for crosstalk and system noise. The cable standard provides performance of up to 250 MHz and is suitable for 100BaseTX and 1000BaseT (Gigabit) Ethernet.


The cable contains four twisted copper wire pairs, just like earlier copper cable standards. Although Cat6 is sometimes made with 23 gauge wire, this is not a requirement; the  specification states the cable may be made with 22 to 24 AWG wire, so long as the cable meets the specified testing standards. When used as a patch cable, Cat6 is normally terminated with an 8P8C modular connector, commonly referred to as an "RJ-45" connector. Cat6 connectors are made to higher standards that help reduce noise caused by crosstalk and system interference.


Some Cat6 cables are too large and may be difficult to attach to RJ45 connectors without a special modular piece and are technically not standard compliant. If components of the various cable standards are intermixed, the performance of the signal path will be limited to that of the lowest category. The maximum allowed length of a Cat6 cable is 100 meters (330 ft).


quote iconThe cable is terminated in either the T568A scheme or the T568B scheme. It doesn't make any difference which is used, as they are both straight through (pin 1 to 1, pin 2 to 2, etc). Mixing T568A-terminated patch cords with T568B-terminated horizontal cables (or the reverse) does not produce pinout problems in a facility. Although it may vary slightly or sometimes degrade signal quality, this effect is marginal and certainly no greater than that produced by mixing cable brands in-channel. The T568B Scheme is by far the most widely used method of terminating patch cables.


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Plenum Cable Definition

24 Sep 2009
Plenum cable is cable that is laid in the plenum spaces of buildings. The plenum is the space that facilitates air circulation for heating and air conditioning systems, by providing pathways for either heated/conditioned or return airflows.patch cable

Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum. The plenum space is typically used to house the communication cables for the building's computer and telephone network. Additionally, no high-voltage powered equipment is allowed in the plenum space because presence of fresh air can greatly increase danger of rapid flame spreading should the equipment catch on fire.

quote iconNote that diligence is required to make sure that a non-plenum airspace stays that way. A non-plenum airspace can become a plenum airspace by accident if the ductwork is disconnected and not properly repaired. Ductwork degradation can occur due to building damage such as earthquakes, aging or adverse environment causing the metal to corrode and fall apart, or simply negligence on the part of building contractors that leave work unfinished. Discovery and repair of unintended plenums is difficult due to the hidden nature, limited space, and difficult access of most installed drop ceilings. For highest fire safety it is best to assume all drop-ceiling airspaces are plenums, whether or not they are officially designated as one.



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Cable Testing and Certification

28 Aug 2009
Test-Um's NT955 Validator-NT™ is an all-in-one network management tool with a 4-inch color LCD screen. We will use this tool to certify, identify, configure and document your Ethernet network. The Validator-NT provides every feature we need to test, trace and tune your Ethernet network.

This powerful planning and certification tool tests speed and performance using the latest nt955-cable-testertechnical advances in digital measurement. It defines the job, makes the tests, prints results and stores data. Our Validator-NT measures and presents fast, clear speed and performance results up to 1 Gigabit.

And the software lets us lay out a floor plan, document and print test results plus archive jobs for future reference. It ties together all the different cable criteria found in complex voice/data/video installations. Then it presents concise information in printed reports while storing data for future use.

 

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Cat5/5e Network Cabling Usage and Methods

27 Aug 2009

Category 5


Ethernet_RJ45_connectorCategory 5 cable includes four twisted pairs in a single cable jacket. This use of balanced lines helps preserve a high signal-to-noise ratio despite interference from both external sources and other pairs. It is most commonly used for 100 Mbit/s office computer networks, such as 100BaseTX Ethernet, although IEEE 802.3ab defines standards for 1000BaseT - Gigabit Ethernet over category 5 cable.

Category 5e


Cat 5e cable is an enhanced version of Cat 5 that adds specifications for far end crosstalk. Although 1000BaseT was designed for use with Cat 5 cable, the tighter specifications associated with Cat 5e cable and connectors make it an excellent choice for use with 1000BaseT. Despite the stricter performance specifications, Cat 5e cable does not enable longer cable distances for Ethernet networks: cables are still limited to a maximum of 100m (328 ft) in length.

Connectors and other information


quote iconThe cable exists in both stranded and solid conductor forms. The stranded form is more flexible and withstands more bending without breaking. Taking these things into account, building wiring (for example, the wiring inside the wall that connects a wall socket to a central patch panel) is solid core, while patch cables (for example, the movable cable that plugs into the wall socket on one end and a computer on the other) are stranded. Outer insulation is typically PVC or Plenum. Plenum cable is designed to go into drop ceilings that are used as air returns for the air-conditioning systems in modern office buildings.

Nearly always, 8P8C modular connectors, commonly referred to as "RJ-45", are used for connecting category 5 cable.

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Network Cabling ,cat5 cat6 cabling

Choosing between Cat5e and Cat6 at your Office

24 Apr 2009

Trends


The trend is towards higher speeds, of course. Offices have faster computers, faster Internet and more demanding applications. But does this translate into a need for Cat6 cable?

cat5 cat6 cabling,Data CablingCategory 5e and Cat6 Cable


Cat 5e cable is an enhanced version of Cat 5 that adds specifications for far end crosstalk. Cat 5e cable does not enable longer cable distances for Ethernet networks: cables are still limited to a maximum of 100m (328 ft) in length. Each Cat 5e cable can carry up to 100mb/sec of data.

Cat 6 cable carries 1gb/sec of data and therefore has 10 times the data capacity of Cat 5e.

The Decision Considerations


Cat 6 will not make your Internet speeds faster. Even at fiber speeds, the Internet still only runs at a fraction of Cat 5 speeds. Cat 6 will also not make VOIP phones were better because VOIP uses only 60-90k per phone line. So, VOIP is a very unlikely reason for using Cat6 cabling

The only reason for using Cat 6 is because you are pushing a lot of data over your cable. This is true when you are running applications off of a server as in the case of a virtual PC environment where applications do not reside on the local desktop system. It is also true when you have applications that have very large data files as in CAD/CAM and other demanding graphic design systems.

A secondary, yet important, consideration is cost. Cat 6 cable is twice as expensive as Cat 5e and it also r

equires Cat 6 jacks, inserts, patch panels and switches. This can add considerably to the overall cost of a project. Any Cat 5 component will slow the connection down to 100mb.

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