Twisted-pair cable is one of the most common; it’s made up of pairs of wires twisted around each other, as shown in Figure and comes in two varieties:
- Unshielded Twisted Pair (UTP)
- Shielded Twisted Pair (STP)
Twisted pair cable cable is used in 10BaseT/100BaseT networks.
Twisted pair cable cable is categories as follows
- Category 1 (CAT1) : For voice-only transmissions. Used in most phone systems today. It contains two twisted pairs.
- Category 2 (CAT2) :Transmits data at speeds up to 4Mbps. It contains four twisted pairs of wires. It’s also not used in networks and is suitable only for voice grade.
- Category 3 (CAT3):Transmits data at speeds up to 10Mbps. It contains four twisted pairs of wires with three twists per foot. This is the lowest-level cabling you can safely use in a network.
- Category 4 (CAT4): Transmits data at speeds up to 16Mbps. It contains four twisted pairs of wires.
- Category 5 (CAT5):Transmits data at speeds up to 100Mbps. It contains four twisted pairs of copper wire to give the most protection.
- Category 5e (CAT5e) :Transmits data at speeds up to 1Gbps. It also contains four twisted pairs of copper wire, but they’re physically separated and contain more twists per foot than Category 5 to provide maximum interference protection.
- Category 6 (CAT6) : Transmits data at speed up to 10Gbps. It contains four twisted pairs of copper wire and is used in 10GBaseT networks
- Category 7 (CAT7): It supports frequencies of up to 600 MHz.
Each of these six levels has a maximum transmission distance of 100 meters.
Advantages of Twisted pair cable :
- It is very easy to install and maintain in network.
- Twisted pair has very low weight.
- This cable can be easily connected
Disdvantages of Twisted pair cable :
Low transmission rates they provide over long distances.