Q:

How does the telephone work?

A:

Quick Answer

For a phone to function properly, a duplex coil and frequency generator/touch-tone keypad are needed. With a landline phone, two copper wires run from a box at the road to a box in the house. According to How Stuff Works, the way telephones work has not changed in nearly a century. In the simplest telephones, there are only three small parts: a hook switch, a speaker and a microphone.

Know More
How does the telephone work?
Credit: Nisian Hughes Stone Getty Images

Full Answer

Telephones change a person's voice into electric signals, and a receiver changes the signals back into a voice, according to the Telecommunications History Group. Each phone jack in the house is connected to the two copper wires. A large cable with about 100 or more copper pairs runs along the road. This cable usually goes to the phone company's switch. Every person's voice is sent down a single wire to the phone company's office. The phone line connects to a line card at the switch so a dial tone is heard. A voice can be transmitted by fiber optics, satellite or microwave towers. Computers and air help transmit phone calls unlike wires and operators from decades ago; however, if an older phone was hooked up to a wall with a phone jack, it would still operate.


Is this answer helpful?

Similar Questions

  • Q:

    How do cell phone towers work?

    A:

    Cell phone towers are constructed using steel shaped in a pole or a lattice. These towers house radio transmitters and receivers that allow communications to transfer between phones and towers. The radios are connected to the tower antennae using sets of thick grounded cables.

    Full Answer >
    Filed Under:
  • Q:

    How do mobile phone masts work?

    A:

    A mast for cellular networks is a tower upon which antennas are housed for transmitting cellular signals, but the mast transmits no signals itself. Masts can be various sizes, and their size is determined by location, local regulations and the number of antennas attached to the mast.

    Full Answer >
    Filed Under:
  • Q:

    How does a phone tracer work?

    A:

    A phone tracer uses GPS satellites, cell phone towers and wi-fi triangulation to locate a particular mobile phone. The device must be powered on for the tracing software to find a real-time location. Some software, such as Apple's Find My Phone, gives the last recorded location if a device has been powered off.

    Full Answer >
    Filed Under:
  • Q:

    How do cell phone radiation levels work?

    A:

    Cellphone radiation is a type of non-ionizing radiation, typically thought of as a safe kind of radiation, and a form of electromagnetic radiation that falls somewhere near where microwaves are found on the electromagnetic spectrum. Cellphone radiation is emitted from the phone at varying levels depending on the model, and it is measured at a specific absorption rate, or the rate at which human tissue absorbs the incoming radiation.

    Full Answer >
    Filed Under:

Explore