One of the greatest inventions in the history of humankind, without which we would be unable to live today, is the telephone. The telephone is a telecommunication device that allows acoustic signals to be transmitted over long distances.
The origin of the landline phone has always been disputed, as several people have claimed credit for its invention.
What Is A Telephone?
Telephone (from the Greek tele, “distance, far,” and phonos, “sound”) is a telecommunication device that allows encoding, decoding, and transmitting sounds at a distance through the use of electrical signals.
It was initially presented as “the sonorous telegraph” since the telegraph was the only means of immediate communication over long distances at the time of its invention.
However, the telephone revolutionized human telecommunications forever. Within a few decades became so popular that there was one on every street corner, then in every home, and more recently, one in every pocket.
Moreover, the telecommunications revolution unleashed by the invention of the telephone opened the field for other forms of electronic telecommunication, such as computer networks. In other words, it set the first precedent for the globalized and interconnected world of the 21st century.
Who Invented The Landline Phone?
The telephone, or at the time, the telethrophone, was invented by the Italian Antonio Meucci in 1854. Meucci needed to connect his office to his bedroom to talk to his wife, who was bedridden with an illness.
The device could transmit acoustic signals over a distance employing electrical signals. It was the forerunner of today’s telephone, but Meucci had no money to patent the invention, so his discovery was never recognized.
For a long time, Alexander Graham Bell was considered the telephone inventor, but only because he was the first to patent the device in 1876.
Recently in 2002, the U.S. Congress approved the recognition of Antonio Meucci as the inventor of the telephone.
Parts Of A Landline Phone
- THE RINGER OR SIGNALING DEVICE: Is one of the essential components in a landline telephone. The purpose of the device is to alert the user when an incoming call is received.And nowaday is https://khosim.com/sim-vinaphone SIM Card
- HYBRID COIL: It is a winding that functions as a transformer that receives and transmits only one pair of conductors.
- THE DIALER: Old telephones included a rotary dialer that, when turned, produced pulses that interrupted the flow of the telephone circuit.
- DTMF KEYPAD: These are extra keys with unique functions.
- HANDSET: It is the component of the telephone that rests against the face, one end over the ear and the other over the mouth. It has an internal receiver that translates electronic signals into a sound that a person can understand. At the other end of the handset is the speaker, which is the transmitter. This is actually a microphone that picks up sound waves.
- THE SWITCH: Landline phones are equipped with switches. On most units, these are called hook switches and are located where the handset rests.
How Does A Landline Work?
Landline phones, in principle, work by transforming electrical impulses into sound waves and vice versa.
For this purpose, two circuits are used that operate simultaneously: one handles the conversation (analog part of the device), and the other deals with dialing and calling. It is convenient to see them separately.
- CONVERSATION CIRCUIT. It comprises four components: an earphone, a carbon microphone, a hybrid coil, and an impedance of 600 ohms, at least in traditional telephone models. The microphone originates the signal, receiving the sound waves of the voice and converting them into some electrical impulses that, on the other side, are received and reconverted by the handset.
- DIALING CIRCUIT. It is composed of a disk that allows actuating a switch that generates a series of pulses according to the dialed number (for example, 0 has 10 pulses) or by a keypad that operates in the same way but sending two tones for each pulse. This circuit is activated when the handset is lifted. When a call is received, an impulse is released from this circuit that causes a metallic bell to oscillate using an electromagnet.
Advantages Of Using A Landline Phone
Among the essential advantages of using a landline phone are the following:
- NO BATTERY: this is one of the greatest advantages of this type of telephony since, in general, this type of telephone does not need any battery.
- THERE IS ALWAYS A LINE: the landline phone can always work even when there is no power and does not depend on the existence or not of coverage.
- LOCALIZED: the landline phone is always reachable, unlike the cell phone, which may be lost or unreachable at any given time.
- NO RADIATION: landline telephony does not emit radiation, unlike mobile telephony, which does.
- GREATER PRIVACY: many people do not like to be connected all day and wherever they are, as is the case with mobile phones.
- CHEAPER: in general, landline phone rates of telephone companies are more affordable than cell phone rates.
Disadvantages Of Using A Landline Phone
Among the main disadvantages of using a landline telephone are the following:
- NO MOBILITY: the landline phone cannot be used outside the home or the place where it is installed.
- NO APPLICATIONS: unlike cell phones, landline phones do not support the playback of music, applications, etc.
- INSTALLATION: the use of landline telephony requires a line installation in a specific place. Any change of address may entail associated costs from the telephone company for the new installation.
See Also : https://khosim.com/sim-so-dep SIM Card