A cordless phone has become one of the most common sights in homes. Provides ease of use with crystal clear sound quality. A cordless phone can be used while walking around the house or backyard as it provides convenience of use.
The cordless phone works on the principle of radio waves. Send and receive digital signals from the base station to the phone. This signal is then encrypted and converted to sound. Cordless phones are considered a small miracle of modern life. Before the advent of mobile phones, a cordless phone was the only option that allowed people to talk while moving freely in the privacy of their homes.
Most cordless phones have the same features as a standard phone and are available in many models. A cordless phone is simply a combination of a phone with a radio transmitter and receiver. It consists of two main elements, handset and base unit. The main phone jack plugs into a phone jack and the phone is held in a slot provided in the base station for charging. The base unit receives incoming calls and converts them into an FM radio signal and transmits it to the phone.
This communication system was first invented by a jazz musician named Teri Pall in 1965. The original system consisted of a base unit and a remote control that operated at low radio frequencies. This low frequency allowed the use of the phone from an area within range of the base. Power was required for the phone to work, so in times of power outage, said unit would not work. The frequency initially used for cordless phones was 1.7 Mhz. This was of inferior quality and had issues with accessibility range and interference. FM was then used at higher frequencies of 49 MHz, 900 MHz, 2.4 GHz and 5.8 GHz. This provided clear sound quality without interference from external objects.
Teri Pall made a breakthrough in the field of telecommunications and is credited with revolutionizing wireless communications.
