Telephones have been the focal point of the 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 the telephone are 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 between two people was possible. It was an unheard of phenomenon and people criticized it as much as they accepted it.

Telephones were a large, fixed equipment and could only communicate between specific groups of people. Phones have since been improvised and made to look attractive, stylish, and a practical device. Engineers used lighter, more durable materials in an effort to make the phones portable and efficient. By the 1950s, phones had become quite efficient and were no longer so cumbersome.

A lady named Teri Pall invented the cordless phone in 1965. She was a jazz singer by profession and came up with an idea to eliminate the wiring and make the headset cordless. Such a cordless phone operated at a low frequency of 47-49 MHz and worked well only in small areas. Advanced versions of HF cordless phones are able to function without problems in large spaces. The efficiency of high-frequency phones is higher than that of low-frequency phones with higher security, as it became difficult to interfere with calls.

The Federal Communications Commission or the FCC gave companies permission to manufacture 900 MHZ frequency phones in 1994 only. This government action led to an increase in demand for wireless phones. The 900 Mhz frequency was ideal for eliminating static caused by walls, appliances, and interference in signals from other objects. They provided high-quality sound output, but were still prone to eavesdropping. To strengthen security, the FCC allowed manufacturers to make phones with 2.4 GHz and 5.8 GHz frequencies.

These are secured cordless phones and cannot be interrupted by any radio scan. High-end cordless phones evolved primarily with conversation confidentiality in mind.