Telephones have been the focal point of communication media for many years. The telephone was invented by Alexander Graham Bell after much trial and error in 1870. The invention of the telephone, as it is called today, began with the electrical transmission of speech. The telegraph and telephone are both wire-based electronic systems. The telephone was the result of Mr. Bell’s efforts to perfect the telegraph. This was in high demand as vocal communication was possible between two people. It was an unprecedented phenomenon and people criticized it as much as they accepted it.
Telephones were a large, stationary piece of equipment and could only communicate between specific groups of people. Since then, phones have been improvised and made to look cool, stylish and practical. Engineers used lighter, more durable materials in an effort to make phones portable and efficient. By the 1950s, telephones had become quite efficient and were no longer as cumbersome.
A woman named Teri Pall invented the cordless telephone in 1965. She was a jazz singer by profession and came up with the idea of eliminating the wiring and making the handset cordless. Said cordless phone worked at a low frequency of 47-49 MHz and worked well only in small areas. Advanced versions of higher frequency cordless phones are able to function perfectly in large spaces. The efficiency of high-frequency phones is higher than that of low-frequency phones with higher security, since it is more difficult to interfere with calls.
The Federal Communications Commission or the FCC gave companies permission to manufacture phones with a frequency of 900 MHz only in 1994. This government move caused an increase in the demand for wireless phones. The 900 Mhz frequency was ideal for eliminating static caused by walls, appliances, and interfering signals from other objects. They provided high-quality sound output, but were still prone to eavesdropping. To enhance safety, the FCC allowed manufacturers to make phones with frequencies of 2.4 GHZ and 5.8 GHZ.
These are secure cordless phones and cannot be interrupted by any radio scanners. Evolved high-end cordless phones that primarily take into account the confidentiality of conversations.