we use twisted pair wire for a phone becaues twister cable is 2 form shilded and unshilded unshilded cable is good for transmission both data and voice and its frequency range is fast it is consist 2 conductor.
These cables are used in telephone lines to provide voice and data channels.
These cables are used in telephone lines to provide voice and data channels.
A shielded twisted pair or STP is a copper telephone cable that secures signal-carrying wires inside a conducting shield. It main purpose is to reduce the possibility of electromagnetic intrusion.
twisted pair
UTP stands for 'unshielded twisted pair'. These cables are usually found in Ethernet networks and telephone lines. They are also sometimes found as part of a security network.
Alexander Graham Bell did not invent the twisted pair; however, he is known for his work on the telephone and various telecommunications technologies. The twisted pair cable, which consists of pairs of insulated copper wires twisted together, was developed later, with significant contributions from other inventors. The concept gained prominence in the late 19th century, primarily for use in telephone and data communications.
Since the ringer voltage across the twisted pair is 120 VAC RMS the telephone can definitely handle that. Given the fact that the telephone is also supposed to survive induced surges from nearby lightning strikes to the line the telephone should be able to handle over 1000 V common mode impulses (but I don't know the exact limit). No telephone is expected to survive a direct lightning strike to the line (which could be millions of volts). Note: common mode means the voltage is applied between the twisted pair lines (both at about the same voltage) and ground. If the survivable common mode voltage were to be applied across the twisted pair instead it would severely damage the telephone.
This depends on what "type" of twisted pair. Category 5 ( CAT5 ) cable can transmit up to 100 Mb/s, while Category 6 can transfer up to 1 Gb/s ( 1,024 Mb/s ) The most common twisted pair is CAT5, and CAT5e, used in home networks, business networks, and some multi-line telephone lines.
1. Copper UTP (Unshielded Twisted Pair) 2. Optical Fiber
One primary advantage of UTP over STP or Fiber is cost. Twisted pair is also more simple to use in many applications (telephone, serial data, etc.) than fiber.
A typical landline telephone system in a home is connected with two wires, known as a twisted pair, which carry the voice signals. These wires connect the telephone to the local telephone exchange. In some cases, there may be additional wiring for features like multiple lines or extensions, but the basic setup relies on this two-wire configuration.
Unshielded Twisted Pair Category 3. Can be used for 10Mb Ethernet or 2 phone lines, as it has 2 pairs of twisted wired inside.