Posts Tagged ‘Network Cabling San Diego’

Options for network cabling Including Cat Cabling

Posted on: April 11th, 2013 by
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Options for network cabling Including Cat Cabling

Network cabling is the medium via which information is relayed between various network devices. There are various kinds of cables that are often used when connecting the network devices. In some cases, networks only use one kind of a cable while others use several types of network cables. The kind of cable selected for a network is associated with that network’s protocol, topology and size. Understanding the features of various cable types and how the associate with other factors of a network is crucial for the establishment of a proper network. Below are the kind of cables employed in networks and other related subjects: – UTP (Unshielded Twisted Pair) cable

– STP (Shielded Twisted Pair) cable

– Coaxial cable

– Fiber optic cable

– Wireless LANs

– Cable installation guides

Twisted pair cabling exists in two forms: shielded and unshielded. UTP: Unshielded twisted pair is the most familiar and usually the best alternative for school networks. The quality of UTP can range from telephone-grade wire to very high-speed cable. The cable consists of four pairs of wires within the jacket. Every pair is twisted with another number of twists per inch to assist get rid of interference from nearby pairs or other electrical components. A tighter twisting is more suitable for greater support of transmission rate and higher cost per foot. Below is the class for Unshielded Twisted Pair:

a) Category 1: Telephone wire – voice only

b) Category 2: Local Talk – Data to 4 mbps

c) Category 3: Ethernet – Data to 10 mbps

d) Category 4: 16 mbps Token Ring – Data to 20 mbps

e) Category 5: Fast Ethernet – Data to 100 mbps

f) Unshielded Twisted Pair (UTP)-Connector:
The typical connector for UTP cabling is the RJ-45 connector. This connector is made of plastic that resembles a big telephone style connector. The slot enables the RJ-45 to be put only in one way. RJ is the synonym for Registered Jack meaning that the connector goes through a standard that is borrowed from the telephone sector. The standard designates the wire that goes with every pin within the connector. The challenge of UTP is that it can be volatile to electrical and radio frequency interference. While the STP is good for environments facing electrical obstruction. Nevertheless, extra shielding may make the cables a bit bulky. The shielded twisted pair is usually utilized on networks with the use of Token Ring topology.

Coaxial Cable
This cabling has one copper conductor at its core. The plastic layer insulates between the inner conductor and the braided metal guard. The metal shield enables the blocking of outside interference from motors, fluorescent lights and other computers. Even though coaxial cable is challenging during installation, it greatly resists signal interference. Moreover, it can support more cable lengths amidst network components compared to twisted pair cable. The two kinds of coaxial cabling are thin and thick coaxial. Fiber Optic Cable
The cabling consists of center glass core that is covered by various layers of protective materials. The cabling transmits light instead of electronic signals getting rid of electrical interference. This makes it appropriate in some environments that have a huge level of electrical interference. It is usually used in connecting networks from one building to another since it resists the influence of moisture and lighting.

Network Cabling Options in San Diego

Posted on: April 11th, 2013 by
0

Network Cabling Options

Cable is a medium via which information moves from one network device to another. Several types of cables are utilized with Local Area Networks. In some situations, a network uses only a single type of cable; however, other networks need varieties of cables. The type of cable selected for a network is based on the network’s protocol, topology and size. Comprehension of the features of varieties of cables and their relation to other aspects of a network is vital in developing a successful network.

Types of cables used in networks
• Twisted Un-shielded Pair Cable
• Twisted shielded Pair Cable
• Fiber Optic Cable
• Coaxial cable

Twisted pair cables are of two types; the shielded and the un-shielded. The un-shielded twisted pair is very popular and it is usually the best alternative for school networks. Its quality varies from telephone grade wire to enhanced speed cable. The cable contains four wires within the jacket and each pair has different number of twists per inch to assist in eliminating interference from other electrical devices and the adjacent pairs.
Even though the un-shielded twisted pair is cheaper, it is sometimes susceptible to electrical and radio frequency interference, it should be away from fluorescent lights, electric motors etc. The shielded twisted pair is a marvelous option where cables must be placed in extremely sensitive environments or environments with much potential interference. Shielded cables are also worthwhile in extending a cable’s maximum distance.
Shielded twisted pair cable has three different configurations:

Every pair of wires is shielded individually with foil. There is a braid or a foil shield inside the jacket which covers all the wires as a group. Each individual pair has a shield, there is also a shield around all the Coaxial Cable.

Coaxial wire cabling possesses one copper conductor at the center. There is a plastic layer between the braided metal shield and center conductor which provides insulation. The metal shield blocks external interference from motors, other computers and fluorescent light. Even though it’s difficult to install, it is greatly resistant to signal interference. Besides, it is able to support larger cable lengths as compared to twisted pair cable between network devices. Coaxial cabling are of two varieties; thin and thick coaxial. Thin coaxial cable is popular in school networks particularly linear bus networks. The thick coaxial cable possesses an additional protective cover which keeps moisture at bay from the canter conductor. It is because of this that it is great for running longer lengths in linear bus networks. However, it has a demerit of not bending easily and difficulty in installation.
Fiber Optic Cable

Fiber optic cabling has a center glass or plastic core which is enclosed by many layers of protective materials. Its transmission of light rather than electronic signals eliminates problem of electrical interference. This is why it is ideal in places where there is large amount of electrical interference. Due to its immunity to effects of lighting and moisture, it has become a standard for network connection between buildings. It can also transmit signals over a greater distance in comparison to twisted pair and coaxial. Besides, it carries information at enhanced speed which widens communication possibilities to encompass interactive services and video conferencing. Its cost is comparable to copper cabling but it is very difficult to modify and install. They are of two types. Multimode and single mode, single mode is able to offer more distance and it’s more expensive, the multimode type has a large diameter.