Telephone Cables

Telephone Cables


Telephone cables are the backbone of any country's telecommunication structure. Without their help any organization is unable to work properly and efficiently. Usually a telephone cable is a multi conductor cable constituting of twisted pairs for the purpose of telephone audio use.

Telephone cables are available in different lengths and colors. Usually they have a PVC jacket to ensure a durable line cord that make possible their extensive use. Generally it is constructed from a copper wire with a high-micron, gold-and-nickel-plated termination. The specific properties of these materials ensure excellent sound and data transfer.





Telephone Cable Materials
The materials used for constructing the telephone cables should be such that the transmission of signals and data must be uniform and clear. Usually they are made of homogeneous mixtures of highly refined hydrocarbons. They are petrolatum based with added elastomer and polymers. Such materials are added to get their unique characteristics.


Telephone Cable Types
Cable provides the medium through which data and information is transferred from one network device to other in the form of analog signals. Different types of cables are required for varieties of applications. For the successful functioning of a network, it is necessary to understand the features of different types of cable.
Copper cable
Fiber optic cable
Pressurization of Telephone Cables
Moisture is the main threat to telephone cables (conductor pairs). Paper or pulp is used as insulation between the layer of individual conductor pairs made of copper. It provides magnificent insulation characteristics as long as it remain dry. For a long time pulp has been used for insulating the telephone cables. It had almost no competition from any other material. But in recent years plastic insulated conductor (PIC) cable has occupied its position strongly in the market and has acquired the top spot.

The telephone cables are under grounded almost 7 feet below the surface. If the cables are surrounded with water then for each foot of water level above the cable approximately 0.43 Pounds per Square Inch (PSI) of pressure is applied. There will be a lot of water pressure bearing down on the cable. In case of any crack in the cable, water will pervade and will damage the conductor. The pressure within the cable should be in excess of the pressure that could be exerted by the water. To acquire this particular objective, telephone companies have declared a minimum air pressure standards for cables in different environments.

Telephone Cable Installation Tips
Never install the telephone cables in the holes containing high voltage wiring. It is a very common mistake. Doing this will result in bringing the telephone cables close and parallel to high voltage wiring. It will result in interference on the telephone wire. The electricity flowing through the high voltage wire can create electromagnetic field in the telephone cable and it can disturb the communication through the wire and might create noise. The telephone cables should be kept at least 16 to 24 inches away from high voltage wires. And it is possible to drill a separate hole for telephone cables.

Type and Size of Telephone Cables
The type and size of telephone cables should be appropriate according to the need. 22 or 24 gauge twisted pair solid conductor wire is generally preferred. 6 conductor wire should be used instead of 4 conductor so that 6 wires are grouped together inside the outer insulation