Telephone Cable in Kenya
A telephone cable in Kenya is a method of guided transmission for your telephone line. This acts as a physical path to transmit electromagnetic waves and carry information from point to point. This is done by means of a conductive material such as copper wiring. Telephone cables are sheathed in a protective material such as PVC in order to protect the wires from damp and damage.
What is a telephone cable used for?
A telephone cable can be used for all kinds of communication purposes. They’re found in telecommunication applications such as audio and TV equipment as well as in computer and telephone networks. Fibre optic cables are a more advanced version of telephone cables.
What type of cable do I need?
The type of telephone cable you choose will depend on the specific task it is needed for. For example, in high-tech audio equipment, it is necessary to prevent sound interference. The telephone cable will therefore need an extra conductive layer to ensure inference doesn’t reach the cable itself.
Whether the cable is to be used inside/outside or as a telephone extension will also determine the type of cable that needs to be used.
There are a range of telephone cables available including those that have been manufactured to British Telecom (BT approved) and European standards.
All telephone cables can be connected to a telecommunication network interface such as a Registered Jack (RJ). The RJ11, RJ14 and RJ25 connectors are the most commonly used interfaces for telephone connections with the RJ11 being the most widely implemented. The RJ11 is a modular connector with wire for one telephone line and is used for single-line telephones in most homes and offices worldwide.
How are Telephone Cables Wired?
First of all, telephone cables in Kenya are typically copper to help with conduction. However, aluminum has been used before. In most modern US homes, the telephones cables are wired with 6 position modular-jacks with 4 conductors (6P4C) to the house’s junction box.
Types of Telephone Cable
1. Coaxial cable
One of the most common telephone cables is called the coaxial cable. It is called coaxial because it has one physical channel, which is an insulated layer that is a woven shield of copper. This inner layer carries the signal and is surrounded by another physical channel that is created out of a plastic sheath. The outer channel is considered the ‘ground’ where many of the pairs of coaxial tubes are placed and transmit information over a great distance. A few coaxial cables include twin-axial, bi-axial and RG/6 cables.
2. Twisted pair cable
Another type of telephone cable is the twisted pair cable which contains a pair of copper wires- usually colour coded – that are twisted around each other. These cables have a diametre in the range of 0.4 to 0.8 mm. In each twisted pair cable, the number of twisted pairs can vary. In most cases, the higher the number of wire pairs, the better, because it reduces the risk of cross talk and any external noise. However, they have a high attenuation and low bandwidth. There are essentially two types of twisted cables:
a. Unshielded twisted pair (UTP)
These twisted cables do not rely on a physical shield to block any connectivity issues or interference. This is the most common type of twisted pair cable used for both business and residential use. There are various UTPs that differ in their bandwidth as you go up the scale. Like a CAT1 scale has 1Mbps and CAT2 has a bandwidth of up to Mbps.
b. Shielded twisted pair
The second type of twisted cable is the shielded twisted pair (STP). Unlike the unshielded twisted pair (UTP), the STP blocks external interference with foil jacket. This type of twisted cable is used on a larger scale for big enterprises and high-end applications that may be exposed to environmental elements.
3. Fiber optic cables
One of the latest telephone cables out there is the fiber optic cable. Unlike traditional telephone cables that transmit data over copper wires, this cable uses optical fibers to transmit data with light rather than electricity. For added protection, each of these optical fibers has a plastic layer that is contained in a protective tube. This layer makes it resistant to external interference resulting in an incredibly fast internet connection that around 26,000 times faster than the connectivity provided by twisted pair cables. There are two types of fibre optic cables
a. Single mode fibre optic cable
This cable has a small core and only allows one mode of light to enter at any given time. This reduces the number of light reflections as they pass through the core of the cable. This allows the data to travel faster and a low attenuation rate. This type of fibre optic cable is commonly used in telecommunications.
b. Multimode fiber optic cable
This cable has a larger diameter and allows more modes of light and data to enter through its core. Since the light is more dispersed in a multi-mode cable, there is a lower attenuation rate and reduced bandwidth. The connection with a multimode fiber optic cable can only be used for communication over a short distance like telecommunications, LAN and security systems.
4. Jelly-filled telecom cable
A cable that is filled with petroleum jelly which is water resistant is a jelly filled cable. This cable is an underground cable that uses the material polythene as insulation on the conductors.
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20 pair KSH180
25 pair Ksh 200
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50 pair KSH 400
100 pair KSH 600